The MLG Tournament is showing quite a diverse variety of team-setups. I'd even dare say that this Tournament has the widest selection of classes and speccs ever.
So in a way, Arena balance is actually quite good.
However, almost every arena player will agree that damage (and healing) is currently to high. While expert players in TR conditions are generally quite adept at surviving damage the situation is more extreme on live servers (partially due to the heroic gear available). Forum QQ tells the same story as every class has people complaining about too high damage output (Warriors, Hunters, Shamans, Priests, Warlocks, Mages, Paladins, Druid)
Now with players in current Arena gear ranging somewhere from 26000 HP to 31000 HP, how much more HP would be needed to balance things out?
Is a small boost of 10% sufficient? Or do we need a bigger boost of at least 30% more HP or even more?
In my opinion things would be a lot more pleasant if people had around 8000 more HP, ergo with Heath Pools ranging from around 35k-40k.