More gun variety -- absolutely loving this game, but the gun variety is painfully low. The primary guns also have a very similar look/feel. For a loot-based game, they really need to improve on this, though I suppose at this point in the development process it's simply too late.
I'm starting to question if destiny even is a loot based game. The more I play the beta the less it seems to have in common with games like borderlands. Very little loot drops, and even less if you exclude boring white items.