For those of us who use RecentChanges, the change is not visible as far as I know, but Special:Insights can be added as a toolbar to be accessed easily. Of course, the feature is new, and basically seems like a more compact version of UncategorizedPages, WithoutImages, Deadendpages and Special:WantedPages but hey, I guess it lets new users know that these special pages exist and offers more ways to help out with the wiki - yay. An interesting thing to note though, is that the equivalent of WithoutImages at Special:Insights/withoutimages displays statistics of page views for each article. Whether these are daily, weekly or even accurate stats I don't know, but if they can be ordered by page views it could be great at emphasising which pages receive the most traffic and should be taken care of.
If you're not a big fan of Wikia features, this change doesn't really affect the site. But if you want to take a further peep into some of the important maintenance points of a wiki, Special:Insights is worth taking a look at.