Isn't it the umpires' responsibility to administer all awards? If you wanted the umpire to insure a CR actually entered the game when the change is reported, I don't know how you cannot expect an umpire who has effected an award by ruling a ball four would be any less important
For the matter of consistency, since we are not to correct other violations after a subsequent pitch or play elsewhere in the game, why would this situation be different? Multiple players could BOO and if there is one pitch to batter properly following the previous, too late! If a sub enters without reporting and there is a play, if another pitch is thrown, too late!
Just saying.......