Hearthpwn

Dark Archon, as much as you say the hype is overrated, it is backed up by the numbers.

For example, the almost 150,000 arena runs recorded by ArenaMastery since GvG came out, show that people tracking their stats go an average of 5.29 wins with mage, 5.11 wins with paladin and 4.99 wins with rogue. The other classes are pretty close together with priest, shaman warlock, hunter and druid all in the 4.77 to 4.6 range. Only warrior is dangling at the bottom with 4.29 wins on average.

These stats are even more impressive if you remember that everyone picks mage and paladin even if they're not very good with the class, just because they've heard it's good; while classes like warlock, hunter  and shaman are mostly picked by people who are specifically good at playing those classes. So that means even when you have relatively clueless people piloting mage and paladin, they still do better than the more specialized people playing other classes.

So the expansion shouldn't just change the hype, it needs to actually make certain classes stronger to compete with the top dogs. So far, it seems like shaman is well on the way with some great new common and rare cards, but we won't know if its enough until we've seen all the cards revealed.