I personally find Pumpkins on Hunters being one of the main things of AoD, and i'd never really want it changed, its been there from the very start, and i really don't find this a good enough reason to change it.
There is also the fact that any skin using the ''Hat'' function, to add more depth to their skins head, would have that sticking out around the possible Mob-Head we would use. And the Mob-Head would be almost invisible on people with skins like mine, who covers pretty much all the ''Hat'' area of their skins.
I understand that people might want it tho, but i'd rather stick to the way it is x)