I don't think I'll ever understand why does Nexus staff feel the need to break a good thing, and when people finally manage to get used to it, break it again.
It feels as if updates are being pushed out for updates' sake, without actually improving anything. This whole obsession with looking as modern as possible is doing nothing but harming the site's usability and alienating existing users.
A few years ago, when I complained about the new UI update, I was told I should've spoken out sooner (despite me having absolutely no way of knowing about it). This time, I do know, and I am speaking out: for the sake of all that's good and holy, don't fix what isn't broken. By all means, implement the improvements, but leave the UI alone.