Well, mourihno did act in a deplorable manner. Seriously, his team barely had possession of the ball and he still complained and made all those accusations. He played a notoriously defensive football because he knew he would get clobbered if they played their normal offensive football (6-2, 5-0 seriously).
The expulsions might have been caused by acting but that is also part of the sport these days; all teams do it and that includes RM. Barca just so happens could win an oscar (I still can't figure out how the last red card happened lol). It's a brutal combination, they confuse the referees and on top of that they do have a superior game. I don't think it would be all too fair to penalize players after the game, it should be something penalize when the game happens. Even then, being caught faking is a yellow card at most....