I thought of two more things to add.
First, the unification of giants and titans into the primordial forces and all that. Basically, WotC stole my idea for the backstory I was writing for a classic type RPG setting, now on indefinite hiatus...
Second, monsters that do not have PC stats. I don't like the 4e monster design, itself, but I like the idea and insofar as 4e and the Rules Cyclopedia follow the same philosophy in that regard, I approve.