Well I wouldn't say WoW is a PoS now, it's just in an awkwardly poor state, in which it's overall content, polish, and gameplay is keeping it ahead of most of the competition at this time. It's stagnant, it's actually feeling really dated, real-content is too far off even though the user base increased (I think MANY have came back to Cata thinking things would be different like they said, but I'm sure that number will start to decline if it isn't already), not like they needed it too. It's just so odd that they said one thing about content, they obviously have the income to hire more people to work on and create new content/features, yet they're falling behind. At this rate, iirc and correct me if I'm wrong, they're even falling behind TBC standards?
The difference here with the class fixes are that they're sweeping, and they were going on hot-fixes on a daily basis. I'd be all for it, but they were going to massive ends of the spectrum here. Wrath sucked because they'd let a class go OP or broken for months at a time before touching them, which sucked as well. Blizzard can't seem to find that happy medium.