You have to stick with it to some degree to avoid being completely one dimensional.
The Chiefs are just a really good run defense. They haven't allowed an RB to gain more than 60 yards all season.
Cook scored twice on the ground when it mattered tho.
A few wrinkles would be nice like some jet sweeps or WR runs that other teams seem to use effectively.
I think the run game is good...it's predicated on fundamentally sound football, something the Bills are usually very good at.
The Bills WR screen game is essentially an extension of their running game.