From the viewpoint of a warrior/marauder:

Sprint for casters needs to be more of a risk. They can keep it on cooldown and it kills any melee that uses it.

Fix range detection for melee, Not being able to hit someone next to me due to latency sucks.

Sleep needs to be fixed. 30s insta sleep is flat out broken.

Double SMN comps are funny to watch but a bitch to fight.