If VAR can somehow slow diving down or penalties can be given or not given correctly, then I'm for the changes, but if that's the case it has to be done right.
Did he hold Villa after the ref blew the play live? We don't know, but let's say it was blatant (and we know its blatant on every since FK or corner), then by letter of the law, it has to be a penalty from now on because that's a foul by the book and all fouls in the penalty area result in penalty kick.
It's going to change the game of soccer. Maybe it's a good thing, maybe it's a bad thing.
Maybe our set piece defense will get lit up for 14 goals instead of 7.