I’m sure if they sat down for a bit they could reword the offside law to enable quick VAR decisions.
Another area needing some focus is handball decisions and again I think if they put their heads together they could come up with a quick checklist for VAR team. Just a few questions with yes or no answers. Perhaps you need all answers to be yes or maybe if any answer is yes then it’s a penalty.
Third area than can affect a game in a big way is red and yellow cards. This one might be the hardest to resolve and I’m not sure how we get around that.
Not VAR but Last point is my current pet hate and not sure if rules have changed or not but apparently refs just ignore the obstruction rule now as players get away with jumping if front of opposing players, well away from playing distance of the ball, and don’t get penalized. Seems to have started happening in the last year or two.