It hasn’t been positive for american sports. In fact it’s debated here that reviewing calls on replay is one of the reasons that the juggernaut that is american football (for tv ratings) has actually struggled the padt two seasons, ratings are dropping like a stone. Sure they get a lot of the calls 100% correct now but when every decision on the field is now scrutinised, that has ballooned the game times past 4 hours on average. At first I was a proponent but it’s to the point where I would almost rather just let the officials make the call and move on fuck replay.
That’s only one issue, I haven’t even gotten into the minutia of how the reviews have now convoluted the rules and muddied the waters even more so as regards the rule book. The following video was ruled as an incomplete pass and it made the steelers lose this game, and because that they’ve lost home field advantage in the playoffs, a major disadvantage. So there is still a ton of controversy regarding the officials, it’s just evolved.
Maybe soccer will be an easier sport to govern with VAR, maybe not. I just don’t think that it’s a forgone conclussion either way.