Was a close one. It was between class balance (resilience never fixes shit) and release delay (soon BS). I actually think those tie for me. However, I don't think Blizzard can really afford a late release for this game for 2 reasons: 1) People are already bored to death of WotLK and 2) Star Wars: Old Republic is set to release in November and chances are if Blizzard still hasn't released Cataclysm by the time SW:OR comes out, there will be a mass exodus (at least for awhile) of WoW players to the new shiny MMO.
Almost epic that Blizzard is redoing the entire game right before SW:OR comes out. Its almost like history repeating itself since UO came out with AoS (total revamp of the entire game that was widely unpopular) right before SWG came out, and that drove more than half of the UO players to play SWG. Hopefully, Blizzard will have better luck.
---------- Post added 2010-07-26 at 01:33 PM ----------
There was nothing wrong with WotLK heroics. I think people are just used to overpowering them. However, when they first shipped most people didn't dare adventure into HOS/HOL or Occulus. Hell, people still bitch about Occulus. Make no doubt about it, in pre-200 gear, the last boss of HOL was a beotch and often a wipe fest. The system in place now (random dungeon system) won't even let you into the easiest heroic with gear equivalent to what most of us went into the hardest heroic available with back at release. So, in short, you can't balance heroics to be challenging to people in last tier gear, so they shouldn't be bitched at for not doing that.