According to Henry Winter the PL can veto the vote regardless.
That being said I don't think the scrapping of VAR is what is really at play here. Think this vote is just to show clubs are unhappy with how it's going and this will put pressure on the PGMOL to improve and also on IFAB to change certain protocols.
What you will probably see is greater transparency in the stadium and the ability to hear the audio like in most other sports.
I didn't know about the veto......For me any vote which can be veto'd is a waste of time. I take your point about it being a sounding board to gauge the mood officially, but the PGMOL are in contact with football authorities and administrators, and the media etc.etc....they already know the system isn't working as designed. Clarity over the rules will help, ie what is the threshold for handball in the box?...there are all kinds of opaque situations which are a pen one week and not a pen the next...some send the ref to the monitor...some do nothing. My question is can it really be improved?...improved enough that the decision making is far more accurate than it is now? I think there can be gains, but they would be minimal, and nowhere near enough to justify the use of system. The system is convoluted, it takes too long, it's overly inconsistent...and all those things combined add up to a diluted match experience and mind-blowing frustration for the spectators....Remember it is supposed to be entertainment.
I've said before I'm not convinced there's anything to be gained from fans hearing a VAR official telling the ref something that those fans adamantly disagree with. An example: VAR official over the tannoy says "Odegaard potential handball...judged to be accidental" Do you think anyone in Anfield feels even a smidgen better for hearing that?....neither did I.