Could sidestep people and create gaps? It won't really matter tbh, its a sim. It'll just give you another weapon in attack.
Yeah, thing is, if I'm a hole running fullback, and the sim makes it so that that's my main role, then side step won't be that important.
I'd think that a hole running fullback would possibly already have a good side step to get through holes. So I think side step might be a wasted special ability tbh.