I love the current state of the game but there's nothing that really sets apart one level 30 from another level 30. Why not add some talent trees that would allow you to specialize deeper into certain skills or skill archetypes (Damage, Healing, Buffs, etc), while making your character unique in the process? (Until someone on the forums finds the best talent trees and everyone's the same again).
I think it would be a great addition to this game. I couldn't find another topic similar to what I'm talking about so I had to make a new one.