the thing about no 4 is the top leagues have VAR so why do the players still surround the ref? i think captains should be the only players allowed to raise issues with refs otherwise why not book/send them off then for for unsporting conduct, would stop it very quickly.
for me the biggest annoyance which every club does is time wasting such as kicking the ball away, faking injurys etc I would welcome any change which stops that.
in terms of diving perhaps us fans need to play our part like in rugby and laugh at them.