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Thumbs up to Monica's answer. I'd just add that you could redirect some of those pages to thin out the use of no index if possible, but it sounds like you've kept them around as they're marginally useful. You can also click the 'ignore' button for given error messages and they'll go away.

I'm likewise not concerned with AMP.

If your site is already responsive, speedy, and showing up as "mobile-friendly" in search you have an advantage over many sites out there. You'll get much more value by making sure your site is as fast as possible for your users (especially in ecommerce).

Good work James! And nice outline of your steps involved. This will be an asset for people experiencing similar issues I'm sure. Cheers!

Hi Ian. You can go to Google Search Console, register your ownership of both domains, then go into the gear settings for .co.uk and select "Change of Address" and supply the .com domain. That's one step in the process that can help speed up the change.

Another is changing from the old address to the new in as many locations as practical where you were linked from the old one. As Google constantly crawls the web it will also notice these changes and add them to the list that says your .co.uk site is now on the .com.  Places include social profiles, business listings, reviews--pretty much any place online where your site interacts.

Hello. I wouldn't be too concerned with this as a thin content issue as the content of each page is the image, its attributes, size, etc. Several sites--Instagram, Pinterest, Flickr, etc--are almost all purely image based content with the great bulk of their pages being one image on one URL and very little other content.

Google is aware of image heavy sites and gallery formats and has a system in place for aiding in indexing this type of content, their Image Sitemaps: https://support.google.com/webmasters/answer/178636  I'd use that system for indexing your separate image URLs and then monitor the success via Search Console.

If your search console (Google Webmaster Tools) is displaying a manual action for thin content, it's likely not the image galleries. Cheers!

Hello. You can check the Submitted vs Indexed count within Search Console to see whether or not your regenerated sitemap is being picked up already, but resubmitting a sitemap isn't an issue, and fairly easy to do, per Google:

Resubmit your sitemap

1. Open the Sitemaps report
2. Select the sitemap(s) you want to resubmit from the table
3. Click the Resubmit sitemap button.

You can also resubmit a sitemap by sending an HTTP GET request to the following URL, specifying your own sitemap URL: http://google.com/ping?sitemap=http://www.example.com/my_sitemap.xml

Via: https://support.google.com/webmasters/answer/183669  Also from a FAQ in the Webmasters blog they state that, "Google does not penalize you for submitting a Sitemap."

Hi David. Yes, lots of penalties (in the sense of algorithm changes) cause sites to change in rankings as do changes in the competitive landscape, changes in search volumes, changes in link profiles, and so on. During mid 2013, many Panda updates came across (https://moz.com/google-algorithm-change#2013) and could have been the cause, especially if your site was / is struggling to maintain high quality content.  Take a look at the timeline though and your ongoing history and you'll likely see a fairly distinct pattern emerge. Typically a manual spam action causes a near complete removal from the index. Cheers!

Hi Taysir. It sounds like you're making good headway so far. I'd eliminate duplicate content from each domain so that you're not importing any into the finalized site.  Let's say you have Page1A, Page1B, Page1C, and Page 1D.  Page1A exists on the main site and has had all its duplicates on that domain redirected into it. Page1B through D should likewise be sent to Page1A on the main site along with any of their duplicates.  The good news is you should be able to do all of this within the step you're currently working. Cheers!

Hi Stephan. It might be in how the Moz campaign is recognizing your domain. If it's either having trouble with the https vs http or if you've set the Moz Analytics to target a very specific section of your site, i.e. "domain + /folder/", it might be triggering this warning. Looking at the code of your site though, the links are certainly internal for the most part. You can run Screaming Frog or Xenu to get a count as well. Cheers!

I would turn the free question section into a FAQ and hire on an editor or VA to help organize it for you.  Similar to here, you'll probably get a lot of repeats, but that data will help you to figure out what's popular and what needs to be added to your FAQ.

You'd also get the benefit of content freshness as related questions just help modify and build out your existing answers.

Variable link text applies to your internal website pages whether from your own site or externally; however, you'll be best served by giving your most competitive terms and most important pages one relevant link from your home page. On internal pages you can link to those same pages with less competitive and semantically related keywords, but avoid overly linking to one page multiple times per page.  It's also useful for the links to be in context of the rest of your site. Halogen Software does a good job of this (http://www.halogensoftware.com/) Note how in their left-hand navigation they use a contextual link and then use a nofolllow for the "Find out more..." link to the same page.

I can't really speak to the worth applied in this effort.  That depends on your own ROI. But a carefully crafted site will pay long term dividends down the road, even more so as it gains external links with similar keywords.

Paulo, you'll have to test the speed of your site yourself, but you can do so at a place like: http://www.uptrends.com/aspx/free-website-server-network-monitoring-tool.aspx

It will display results from other countries and cities from around the world and help you decide whether or not you need a cdn.

Here's a list on the SEOmoz App Gallery, but not all of it is Wordpress related: http://seomoz.zendesk.com/forums/293216-seomoz-app-gallery...  Yoast is one of the definitive SEOs for Wordpress.  Tons of resources here: http://yoast.com/articles/wordpress-seo/

They're generally updated on Thursday's so you should see it available on the 5th. What you can do in your Analytics though is click on the link "About Your Data" in the top right corner and get the dates and information for your account. Cheers!

You might benefit form a visualization program as well like Visio, Mindjet, or Mindmiester to figure out some of the more intricate details. Also JoelHit's suggestion of using Apple.com as an example is a good one. Even though their main sitemap is smaller than what you're describing there are some subtle takeaways when looking at it as an example (http://www.apple.com/sitemap/).

1. All their top level categories are H2 tagged major categories of their site.
        a. "Apple Info" emphasizes the brand
        b. Mac, iPod, iPhone, iPad all emphasize product sales
        c. iTunes, Downloads, Support emphasize sales and an ongoing customer relationship.
2. Precedence is given to the core aspects of their business via their sitemap.
        a. As outlined above, this is elegant and functional.

Also, you'll certainly want to back up the work you do with an HTML sitemap with XML sitemaps for large scale sites and as Richard suggested register them all with Google Webmaster.

Typically Technorati requires you to post a unique code in your blog to display that you're the author when you sign up for their service. Also of note, Technorati's search is pretty bad. It's better to go to Google and search: yourblogname site:technorati.com.

It sounds like you have the skill set to be effective with Open Site Explorer,  spreadsheets, and management via your CMS.  The graphs and reports you mention are often handy to agencies reporting to clients that want a simple report. Since you're plugged in to the pulse of your site you don't need the extra fluff.  I did recommend Zoho in another post for someone seeking out project management software, but their online docs are top notch as well. Structuring your data and projects to be shared with your internal team and targeting completion date milestones should help with what you want to achieve.

No offense taken.  And that's why I answered the ROI question as I did.  If you're selling large scale real estate or heavy equipment one or two sales may be all you need for the year... it's a much different answer than if you're an affiliate for elastic wristbands.   It sounds like you have a solid understanding of the business side of your business, so if you have cost effective solutions to doing what you want to do you should be fine.

Trying making the absolute URL, i.e. "http://www.mysite.com/category/9-Irons" as your href instead of "/category/9-Irons" in the rel="canonical" link tag.

Google Custom Search has quite a few customization features, to the point where you should be able to make it look exactly like other pages on your site. See: https://www.google.com/work/search/products/gss.html, and, "Match the look and feel of search results to your website by using your own logo and color scheme." For example.  These options come via their paid solution, but could be worth it from a usability and CRO aspect if it makes navigating and purchasing easier.

Patrick's answer gives you a great check list. I'd only add that you within Moz Analytics you can customize the crawler to only report on a certain portion of the site if problems still arise in displaying your data. Still, by using 301 redirection from the old subdomain to new location, cleaning up any old referencing links, and blocking further indexation you should see the errors disappear. Cheers!