At which point they will act like they have tweaked a muscle and limp off, (ie the sub is being made because of this tweak, rather than necessarily tactical) making it a pointless rule that would be hard to enforce
What i would like to see is something brought in to stop players diving after minimal contact such as, if the ref thinks a player falls over far too easily, then there is no foul and the player falling over is booked (meaning players have to try to stay on their feet, rather than the "he's...
The problem i can see with that is when a player moves their arms up to try to cover their face as a shot is hit, the motion of their arms could be interpreted as moving them towards the ball, rather than trying to prevent them being struck in the face by the ball, so would / should that be...