It never fails to amaze me how much people hate change. Doesn't matter if the change is necessary, for the better, etc. It's change, and therefore EVIL!
The only change in the RC that I truly think is an improvement is the custom chrome. The rest is minor and subject to personal preference, not for any quantifiable usability reason. Adding colors back? I'm glad they've remained minimalistic. It's pleasing in the toolbar. I think it's distracting in Solution Explorer, to be quite honest. Change to the ALL CAPS headers? Meh. That's a preference thing. I could care less one way or the other. The all caps menu items? I don't prefer it and it seems like a strange decision in conjunction with removing all caps from titles, but it honestly doesn't make any real difference.
The really important stuff was done in the beta and remains and even was enhanced in the RC. Reduction in clutter and an emphasis on the code. A simplification of the interface, which is always a good thing.