You're kidding, right? I mean, MoP is by far better than Cata, but not even as close as balanced as WOTLK. Yes, game mechanics are much nicer and everything looks better, but even on retail, certain classes are made OP. If they didn't do that and actually balanced PVP as close as they did on WOTLK, it would be definitely the best extension, but this way WOTLK is stil No1.
You're kidding again? Right? Have u seen the bugtracker?
Most of the "Fixed" or "Pending" things are just stupid NPCs, or some quests. Well... things marked as "Other" and things that just have a vote or two. It was just nice story to keep the community under another false hope they would actually fix things that matter, cause very few high voted issues are being fixed.
I think a fact that even after so many months, most of the things are completely broken, and a fact that now they actually hiring new developers says a lot. Just read between the line and u'll get the picture.