What you're saying in the context of the Moura incident makes sense. That was an utterly ridiculous call. Today's was a handball in my opinion though.
I don't know, I think no matter what they try and write the rule up as, it's not going to work. It should just be handballs that creative an unfair advantage and then trust the refs (LOL) to know what that looks like. Moura is fouled and his arm brushes the ball and it doesn't change direction = no unfair advantage. Harvetz arms the ball down, completely changing the direction of the ball, in the penalty area = unfair advantage.