I don't know, I think the game feels a lot better than it did during both WotLK and Cataclysm. The game is still too quick and dirty, but it feels a lot less... Confused? Like the devs actually has a plan and general idea of what they want to do, rather than the little bit of everything mess we had in the past two expansions.
We still have a long way to go to reclaim the glory of old, but I'd say that MoP is a solid step in the right direction. I feel positive about blizzcon, and excited that Rob Pardo is back.