One of the things I would like to see in the future would be some calling specific questlines. Right now everyone in the same faction is doing pretty much all the same quests. It doesn't give you much incentive for alts. It would be nice to see some calling-specific quests to break things up and give people the incentive to try out callings they might not normally even look at. Basically make each calling a little bit more unique by getting to do some things that the other classes don't get to do. The really nice upshot could be some cool looking and/or nicely statted calling-specific armor/weapons/accessories etc. that you couoldn't get anywhere else.