The big issue we'll have with VAR, as I've said before, is convincing whoever it is to actually review something. We've had Josh King fouled in the box two weeks running now and both times it's been waved away without review.
To use an example, we were owed a penalty and (another earlier) red card against Spurs, the culprit being Eric Dier. If anyone thinks VAR would have rectified that injustice, they're wrong. The ref or VAR can still choose to ignore it as if it never happened. Or what about our game v Man City when we were on for an historic draw? Mousset is penalized for a perfectly good tackle and while he's stood in front of the ref waiting to be shown a (completely unwarranted, btw) yellow card, City have already taken the free kick and are off down the pitch about to score. VAR wouldn't have chalked that one off either.
I was amazed by how many times the commentator v Sheff Utd said "that decision will go to VAR" and it actually didn't. Literally, tens of times throughout the game.
Yes it'll probably stop the offside goals against us but I don't believe for a single second that it'll give us all the decisions we've previously been so conveniently denied in the past versus the "big" teams.
My biggest concern has moved away from how long it takes to make a decision and is now focussed on how and when the decision to review will be made as it looks like it's going to be as suspiciously top-6-favouringly "random" as ever.