That's great but as I alluded in that thread, a challenges this system favours the more charismatic, articulate and persuasive managers.
You're fixing a handful of errors whilst creating more opportunities for errors as there will be a greater number of interventions/challenges. And borderline ones, where the referee knows declining could have serious impact later on, if he makes a serious error and removes a teams ability to challenge. And if it's left unchallenged you may still have a refereeing error at the end of it. Either way it will come full circle and the same old issues will exist.
Some of the examples you've given aren't really comparable to the argument, or show a lack of understanding of the current VAR protocol.
The Man U V Wolves as an example, the VAR might have thought it was a penalty. But with the training and guidance he had might have thought it didn't meet the threshold for an intervention. That's very different to 2 referees looking at it and coming up with the same answer, as in this one where both have viewed the monitor and agreed upon a red card sanction.
I'm not suggesting it's right and that because 2 PGMO officials have said it was a red that makes it correct, my argument here is that there's a high probability that CK is challenge by Palace and he goes red.
Do the opposing team get to offer a counter argument to the challenge? I highly doubt it..so the referee is still only going to get a one sided view before he views it, and as above, the right sales man delivers the pitch, he gets the sale. But we still potentially have a refereeing error on the end of it.
We may as well do ask the audience as well if that's the way we want to head as they seem to guide what football expects these days.