I think there should be a way to reduce heat on heatweapons faster. 

Suggestion : if overheated hold R to vent the energychamber on the gun , faster heat reduce. For the overpower problem is think in return the cooldowns on the abilitys should froze in the process and the character should not be able to move or walkspeed reduced significantly of course if you stop holding the R key you will instantly cancel this mechanic and be back to the original one. 

any other ideas ?