Me and a friend of mine were taking about new heavy weapon types, grenade launchers and some kind of high damage precise shot rifle/cannon/laser that can crit, basicly opposite rolls that each current heavy has. Machine guns kill crowds well and rockets deal high burst damage. So the grenade launcher would be and explosive that gets more ammo but does less damage so you could focus on the little guys with it. And the heavy precision would be like a heavy sniper of some sort meant for majors/ultras because they would be able to crit but maybe give them less ammo for balance? Just some ideas.