Happening way too much this year. If you stay down for a penalty, you should automatically be taken from the field for a concussion test. If you trip someone, 10mins in the bin and automatic 2 week suspension. That will stamp it out quick smart.
Diving/milking has been building in the game for a while now. There needs to be less interjections from the bunker and like you said any player who wants to play dead should go off for a concussion test.
Yeah, and it's time to stop letting it build. Soccer penalise people for diving, and rugby league doesn't.