Laieon
Member
You've never played WoW during an xpac release, I take it.
I had 0 problems with Cataclysm or Mists at launch, outside of maybe a queue and some quest areas being a bit too busy (but that's the best time to play!) I don't remember any major issues with Wrath either.
New Blizzard video with quick looks on each new feature, skill and zone we get on 2.0/RoS, including Blessed Hammer killing things.
https://www.youtube.com/watch?v=juT-1ew-ffc
Act V is looking really nice as far as environment art goes.