Think the one thing I would take from American sports is the time keeping and the clock rundown and stopped when the ball is dead as it always seems they make up a number to add on.It's pathetic that these clear improvements take so long to filter through....... Same as the time-keeping protocols they employed.... A couple of seasons of that and the players will soon start to learn that time-wasting is pointless and we've largely eradicated an ill from the game.
Ditto the holding in the box, blocking FKs and so many other rules that if actually upheld would serve as a deterrent in the longer term.