If you could change one rule in AFL what would it be?

The holding the ball rule, what annoys me is when a player who is going for the ball is tackled and the tackler holds the ball under the bloke he's tackled, also i would make it only 1 opposing player can tackle the player with the ball, instead of two or three lying on top of the tackled player, how the hell can he get the ball out if there are two or three on top of him.