I'd have it in the PL tomorrow - with the caveat that it is TOTALLY transparent. The paying public at the game should see and hear exactly what the referee and VAR officials are looking at and pondering. If there's nothing to hide, it should be shown and heard.
I quite often get home from matches seething with perceived injustice over an incident, to be told by someone having watched it on TV that I was right (or wrong!) in my opinion of what I saw. Like the referee, I have one view of it, whereas TV viewers see it from all angles. The other bugbear is that "controversial" incidents are not shown on the big screens, which adds to the frustration. Transparency would do away with this.
Bring it on as soon as possible, but in a way that the matchgoer can see that the correct decision is given, rather than the guesswork (or cheating) that is currently in place.