The assessment of how unfair it is really depends on your perspective. These things are only being addressed by a group of people (a committee) which isn't the same thing as to say, a group of people who know what's best to do. (As an example of how rickety that kind of assumption is to make - a similarly constituted committee awarded the World Cup to Qatar, etc, etc) It's impossible to say whether or not these issues impact matches to the same degree. Really impossible. (Yet you take it as an idiosyncratic starting point that it has been measured. It hasn't.) All that has actually happened is that things that are talked about more (offside and hand-ball rule breakage) have been decided upon as things to be addressed by VAR's designers.) All I can give about the importance of corner kick wrestling is personal experience, a view outward from the core, as it were. When I was left alone in the box and not grappled with, I was a far more dangerous proposition for defenders to try to deal with. I think I would have scored more goals or got into positions to control the ball in the area and assess dangerous options, more often had this not been the case (I'm certain of it actually). Would I have scored or assisted or landed into a dangerous position equally as many more times had all non-offside calls been reversed ... I really doubt it. Granted, that's just a personal perspective, but it is a truthful view of the matter. It just strikes me that you don't want to think that that grappling interference is important. Well, I also suppose, that another good way of looking at that would be to say that if it wasn't fulfilling some fairly important function for defenders, they wouldn't keep on doing it.