Ast and Drk both have some issues. That's two classes out of 12 that are underperforming. And they're not underperforming enough to be incapable of savage. They're just a bit weaker than the alternatives--and with Drk, they can actually perform pretty well as OT if there's a ninja in the group to goad them and put up slashing debuffs.
Brd and Mch, the other two people complain about, are parsing pretty well now at the high end. They could maybe use a couple more tweaks here and there but there's nothing broken or keeping them out of end game. They're a little weaker than other DPS but that's by design because they're 'support'. I'm not sure I personally agree with that design choice as the TP and MP support roles are. . . considerably less valuable at 60 than they were at 50. But people still tend to want at least one of them for any hardcore content, so, I mean, pretty close to balanced.
All the other DPS are very close, SCH and WHM both do their thing very well, no one is accusing Plds or Wars of being too weak (some accuse War of being too strong, but that's due to big instant numbers, not over all parsing, Plds come pretty close thanks to good dots and higher potency basic combos and have better mitigation, and a Drk with slashing debuff up is about equal to War).
So you have very good, much closer than 5% balance on 10 out of 12 classes, and 2 classes that maaaaybe fall into that 5% you say WoW is great for maintaining--when they literally never have maintained that, every time I've tried playing there was a FoM that was much better than a 5% difference. Our weakest classes of the moment are capable of the hardest content, while in WoW that's very rarely been true. And WE have balance issues while WoW is much better at it?
Really?
Really, really?