With the amount of drama over the years about the spread of the shotguns, any change will probably cause controversy, but with what i can understand from the suggestion, the only gain from this suggestion is removing bad aim and considering any hit a full hit, whereas the spread is instead replaced by a circle of radius of hitting (which makes sense from real life, because shotgun pellets usually have many more than just 12 pellets), and if the enemy is within that radius, to just deal damage depending on the distance from them (or, equally stated, the radius of the circle as that gets expanded the further away the enemy is).

The other arguments make no sense to me, because lagging and delay should theoretically have no impact with anti-lead unless that is not functioning as expected.