What it does do is give everyone less places to hide. It still makes mistakes, and I feel the lack of transparency about when and how it is being used needs addressing, but our game today was a perfect example of refereeing game management that would have less chance to arise if the cameras were in play. You can't let the underdog have a helping hand. You can't ignore big calls because of the pressure.
Would var have got involved today for any of the big decisions? I'd hope so, certainly for the penalty and calf scraper, but I still can't be sure. But it at least lets the referees know that an unbalanced implementation of the rules is harder to get away with.
Still needs communication opened to the public and extended use to second yellows. If var doesn't intervene today on the Orient goal, then tell everyone why not, for example. We don't want it stepping in on every contended decision, but when someone leaves the ground and goes flying through the air to rake their studs down a player's leg, you'd hope ten times out of ten it would be stepping in to call out the ref's temporary blindness.