Its so funny how referees are always to be blamed. If they do not call for penalties or give cards, they get blamed for being too cautious if they actually do give penalties and cards, they are blamed to ruin the games.
Seriously, wtf is up with that, ref is human, he doesnt have any slow-mo reruns, he has to decide the second the mistake or supposedly mistake happens. And actually i think ref in last nights game was top level. Apart from very minor issues (which were down to linesman btw), like allowing game to go on offside (Benzemas strike, which was cleared by goalkeeper for example) and some tackles and giving Ronaldo a penalty (he was tackled outside penalty box). Barcas first penalty may have been also from offside position, but it was clear that Ramos was last defender, NEymar was free on goal and he clipped his heals. What else could ref do there. Not give penalty? Then it would have been huge favour for Real, because it would have been wrong. Same way Alonso needlessly rushed into Iniesta for second penalty. It was 100% foul, how could have ref just ignored that.