Being a pre-4.0 PvP MCH, I really dislike that Stun Gun - the only aoe stun in game - forces an Overheat. Sure, you generally use it when you're trying to burst down a target, so the OH damage increase helps, but if used defensively, I don't always want to Overheat. And it kills me to see MCHs use it as "the Overheat button".

Flamethrower's fine though, especially after the change to 5 sec double potency (adds up the same as before).