To stop the overly physical play, you have to make the penalties harsh enough that coaches will change. It also has to be easy to administer as to not slow down the game. A few "radical" changes...
*Yellow cards #5 - #6 becomes a 4min non-releasable and draw defaults to the other team after every goal.
*Yellow #7 and above, each card you play down a player for remainder of the game and draw default continues.
*Cumulative team foul impact- All major team fouls over 5 per quarter results in an automatic clear if in defensive end or an 8m if in the offensive end
*Refs have to call cross checks that are forcefully extended into the other player as a yellow card
*Refs have to call the dangerous follow throughs on offensive players | 
