VAR changes the dynamics of offside, by bringing decisions to a ludicrously small scale. If Sergio was offside yesterday, it was by an inch. Thus the idea of doubt has been eliminated. So benefit of the doubt can no longer accrue to the attacker. Not only that but VAR will seek to find a difference when, for all practical purposes, players are level. I predict we will soon see VAR using over size pictures to find that fraction.
So, the offside rule needs to be changed when VAR becomes the norm. The simplest solution is to say that legs don't count in the decision, only the torso. That restores the benefit of the doubt to the attacker. In addition, you could introduce a rule that says if the torsos overlap, the players are level.
Making such fine judgements is ludicrous when the exact moment the ball moves from the passer is just guesswork.