This game is ok a solo game (get the highscore), but in my eyes fails at being a party game (everyone versus) because it's super hard and most people die and get eliminated within seconds, and they have no way to practice and improve.
Maybe if there was a 10 players coop mode, where as long as we have a survivor we can revive our friends and stuff, and the game starts easier and gets more difficult as the game progresses, maybe it would be playable with that many people?
Controller sharing could also be nice (Left joystick + LB + LT / Right joystick + RB + RT).