I would like to see the ability to knock someone down. It's not the way football is supposed to happen, but it happens in real life, so... When losing, I think I would be a relief for many people to punch someone in the face, to give an elbow, ... especially when playing against friends. If it gets too much, if you feel the ref isn't on your side, if the other team can tackle and foul without being booked, a punch would be a real relief.