IF the VAR worked, Otamendi would've gotten a red for kicking the ball at Rakitic's head, and one of Pique's yesterday's two handballs would've been a penalty.
Also, intentional elbowing is a red, not a yellow. The ref used the VAR on Ronaldo, but didn't have the balls to redcard him. Although imho there was nothing there, not even a foul on his part.
If they decide to keep the VAR, only the referee should decide to consult it if they want to, not a person in a booth making decisions for the ref. And limit the VAR to,say, 2 occasions per game. AND the communication between the ref and the booth people should be broadcast to all.