As Destruction, I am disappointed with my mechanics most of all. The mechanics flow into the dps suffering with movement throughout fights.
The main issue with dps to me is Grimoire of Supremacy is too powerful in its current state and the other spells suffer in damage from it. GoSup needs about half of its power transferred to other spells in an equal transition and then a small bump in damage.
For me, I see really good numbers during GoSup where I am competitive and then outside of it my damage starts to drop until my Infernal is off cooldown and then it goes back up some. I feel like a rollercoaster of dps.