You've got to ask yourself why the wrestle is so important to teams ?? If they don't slow down the ruck then you have a glorified game of dump and run touch footy. That is even more boring in my mind. One thing I would like to see rewarded is low tackles, from hips down. If you allowed round the legs tacklers to leg pull and get back to marker before the play the ball then there is incentive there. That lessens the importance of the gang tackle and wrestle and also opens the game up for offloads and ball players.