Removing a SP works just like how putting the DH in the field works today. The relief pitcher takes the DH's spot in the batting order, so while everyone has the DH, managers still have to consider how they replace pitchers w/r/t the offensive side. So if Schwarber is your DH and you pull the SP, you'd have to move Schwarber to the field to keep him in the lineup? And then the DH is basically gone the rest of the game?