Other than the complaints I lodged before, here is one thing I'd really love to see! When I click on "show new posts" or whatever it's called, and then click through and read posts, they stay on that list, just without the "new post" flag. It would be great if they would disappear from that list after they've been read. Convenience feature. You can say "change your reading habits" (if you're Lady Wu, for example), but I say screw that—change the site to suit all kinds of reading habits!
Familiarity is a big part of it. This site looks a lot clunkier. I know, that's an aesthetic thing, but whatever, it's still legitimate grounds for dislike. The site looks clunkier to me. It's larger, less streamlined, garish Easter colours, annoying post-login screen, etc.
One improvement that I like is seeing my Cao card avatar at the top of the screen in the main bar at all times.