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I have to disagree about link juice. In many cases, canonical tags will work much like 301-redirects, and do seem to pass link-juice. I've even seen experiments where people used canonical tags to move an entire domain. I wouldn't recommend it (except in rare cases), but it seemed to work. I am concerned, though, that you're linking internally to one version, but then using canonical to point to another version. I find that's a bad idea - while it sometimes works, you're sending a mixed signal, and it can cause problems for your SEO efforts. I personally think that a truly canonical URL should be used consistently across the site, including in internal links. Internal links are one of your strongest canonicalization cues. Unfortunately, it's hard to say if link-juice is being passed, given the mixed signal. I'm afraid there's no great way to measure it, at least on the level of the individual link. I should add that Google also isn't a big fan of setting a canonical to page 1 of search results. They'd generally rather you canonical to a "View All" or use rel=prev/next. Canonical isn't always a good bet for pagination these days.

First of all, I like your new design, and typically, large sub-navs are excellent for usability and spidering. As Michael Martinez from seo-theory.com once eloquently put it: "[PageRank] was made to be wasted. Real SEOs understand that." If you think of your homepage as a balloon and PageRank helium, then trying to capture as much PR as possible to increase rank seems logical. Unfortunately, that's not a correct analogy. If you've just re-designed your site, it's likely that there are new problems created you're unaware of. Or, also likely is that - depending on how new your site is - Google's system hasn't finished fully evaluating it. It's normal for a redesigned website to see some rank fluctuations over the course of several days (or even a week or two) while it is in various stages of being indexed in ranked. Do not use ""style='display: none'" to hide links. This is cloaking in its most basic and easily detectable form, and whether you mean well or not, Google can't detect your intentions - so don't expect them to. TL;DR I would recommend you re-evaluate the rest of your site first, your competitors, and link situation before worrying about too many links on your main nav bar as it's usually not the issue.