the premise of Elemental Damage is very attractive for every player, cuz some like more cold, another one fire, etc. But actually, the mechanic it's simple and flat damage, the only difference is the colors of weapons...and the little snare on Cold weapons.
Do you plan to enhance the elments? I mean, they can be very attractive if for example:
Holy: extra damage on Undeads
Arcane: extra damage on Beasts
Lightning: % chance to stun
fire: Ongoing damage around the nearby enemies
poison: after kill, leaves a cloud of ongoing damage
I mean, this can give palyer a second layer of customization, like specilizing in getting Stuns with other skill runes or maybe choosing an arcnae weapon cuz the area u farm most is plagued of beasts , or a WD that has skills that trigger powers after killing an enemy could use a poison wep. This would give elements a right appeal and importance before the eyes of players