You do realize that Price History is a Negative, not a positive, right?

Additionally, AH's don't build communities, it's the exact opposite.

Just because you're used to something, doesn't make it better. From an economics standpoint, the current MW, while not perfect, are much better than an FFXI style AH or even a WoW or similar style AH.

Also, pigeon-holing classes back into roles is not a good thing and should not be in this game. One of the things they got right was their Armory system. Sure, classes do need some more unique abilities, but pigeon-holing them is NOT the answer. If the new Job system (added on top of the Armory system) that will be implemented is anything like I think it's going to be, then everything will be just fine.