Maybe a melee style that does almost no damage but promotes a ton of knocking the targets around? Something of a crowd control style, focused entirely on getting things out of your face.
Honestly you could use the combat stances as a ‘goal’ thing. Shift your style and suddenly you quit trying to senselessly bash zombies with whatever your holding. Cripple stance means you try to stun and knock over your enemy, perhaps for a combo with the default, and crowd control focuses on shoving junk out of your way, or like, back through the window frame you’re busy kiting this small horde through. Or, just shove them into the spike pit they almost side-stepped. Or that lava pit.
Yes, that kind of thing would have a ton of utility to it. It’d make combat a lot more interesting. Maybe some kind of style to promote grappling to the enemy and doing rapid yet lighter attacks? Grab onto them and stab them to death with a knife or something…?