I also think that any player who doesn't get up after a tackle should leave the field to be treated and not be allowed back until the next dead ball. Also a standard ten minutes for an HIA assessment for holding their head.
It won't happen but might sort out the acting.
I don't know why the yellow card issuing for players getting in the refs face isn't done. Everybody agrees that it would bring the power back to the ref but FIFA etc won't enforce it. The rugby system is constantly referred to as THE way to go.