No, no, and no. Things are fine the way they are. You don't need
more brutality. The way things are now really test an MMA fighter's skills and ability to use the rules to his advantage. Knees to the head while grounded will bring MMA more trouble and cause a drop in popularity to those who may decide the fate of MMA. Don't be dumb. This is a bad idea. Don't sign it just because you want to see someone's head get caved in.