Cataclysm

I disagree. Paladins were hotfixed so that the strategy they were using to have infinite mana and good healing won't work anymore. Healing classes are no longer "x class has endless mana and y class OOMs quickly," but rather good healers heal a lot while using their mana well and bad healers OOM quickly. Many of the people who are QQing are the ones who got too used to the lazy style that was WotLK: press a heal button (all the healers only have 1 or 2 heals they use) when someone isn't at 100% HP. That "strategy" is more than enough for any normal fights and probably many heroic fights even in ICC. I, for one, was prepared for the coming mana shortage and practiced using as little mana as possible for the last month of WotLK, so Cata didn't really shock me so much.

Of course there's wrong with it. It certainly raises up more awareness than usual. I'm glad they're making it much more tougher in Cata than Lawl King. Definitely brings back the memories of Vanilla and TBC WoW. Regardless of that, I'm having a blast in the new heroics. Lot of new and interesting mechanics to say the least.