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I don't believe there is any reason to wait for an algo update. Especially if your new site has improvements which could help your CWV scores. Google states that they will be using "field data" (from real users, not bots) over a 28-day period to assess CWV. So, if your new site is going to score better, you would want to build up those scores now. That said, if your new site is going to score worse than your current one, you might do well to fix it prior to launching it. There are plenty of tools (both lab data-based and field data-based) to assess your old and new pages. Page Speed Insights is helpful for public-facing pages. Whereas for not-yet-public pages, you might need to resort to using the Audits tab of Chrome Dev Tools, or other tools which allow for authentication, etc.

This is the right answer minus a few excess characters. If the blog structure is domain.com/2015/09/title-of-blog then the correct code would be as follows: RewriteEngine On RewriteBase / RewriteRule ^[0-9]+/[0-9]+/(.*)$ blog/$1 [R=301,L] This will result in: domain.com/blog/title-of-blog. In other words, Peter you had it right but you just had a few extra characters (you assumed the specific day was also included in the URL structure). Yours would work perfectly if the URL structure was domain.com/2015/09/02/title-of-blog Also, if anyone ever wants to test your rewrite rules this is a great tool. http://htaccess.mwl.be/.