Look I'm going to have a view here that's probably different than everyone, but it needs to be said
I hate all the embellishment/diving that occurs today in all sports, not least of which is in football, which probably has the worst actors of them all
So, coming from that perspective wholistically, I can see VAR overturning this one. We can debate the merits of "if this wasn't Everton, it wouldn't have changed" etc, etc, but it's my opinion I want to see less of what Young did, because big picture it'll make the game better. If I saw a guy embellish that contact against us and a penalty was given in the 90th minute, I'd be fuming.
On this particular circumstance, two things can be true. 1) It's entirely possible that the sum total of what occurred was enough to be a penalty. It was close. The only guy that knows for sure if he was truly impeded vs dove is Young. and 2) the contact on Young didn't warrant how he fell/how he flopped.
I'd have liked to see him try to get to the ball rather than focus on winning a penalty.