What annoys me is that you've got a completely separate ref deciding whether or not that merits a rewatch. I feel the ref should have a chance to see the footage in situations as important and close as that, then if he still thinks that's not enough contact, fair enough. Right or wrong at least it's his informed decision.
As it stands though the inconsistency in the application of VAR is baffling, and provides far too much behind closed doors wiggle room for conspiracy theories to gestate. I have no doubt the powers that be would rather see Liverpool win the title than City, and so far City have had every decision go against them. It might be coincidence or just bad luck, but you certainly can't say it's fair and transparent -- which is the whole point of using VAR.