I don't believe anyone has said it yet, but how about adding a separate control for the Hunter melee? As a Nightstalker, too often have I tried to (strictly) melee an enemy at close range and ended up throwing a smoke/poison grenade. The same applies for the Gunslinger Hunter when I've tried to melee and threw a throwing knife past my enemy's head instead. These situations usually leave me spamming my X button to respawn as opposed to walking away from the encounter victorious and eager for the next run-in. An independent key to ensure that you're throwing a projectile rather than trying to melee would benefit Hunters everywhere.