I have a 94 mage/sorc meteor focused and it’s gameplay is really boring and ineffective. Each meteor costing 85 mana is a joke. Even geting the nodes that refund some of it’s mana cost, the gameplay is all about to throw 2 or 3 meteors and the channel focus risking dying for that mobs that dashes on u or an AOE skill/spell. Mana Regeneration seems to be the worst stat in the game and should be buffed. Items with T7 mana regen only giving u +1 or +2 mr/s is really wild. I have two friends, one playing Rogue with 2 daggers at level 50 and the other playing necromancer and their gameplay seems really smoother and faster.
TL;DR: I think meteor should be buffed somehow, maybe the mana cost, maybe they should make mana regen a better stat. Thats it.