If the QB competition goes into Fall, then at least all 4 QB's will be on the roster until the season is over. We need at least 2 of them ready to play at any moment in case of an injury to someone.
I hope they all improve, and it doesn't matter to me who the starter is. I do think, however, if there is clear separation between whomever gets 1st team reps and others, that someone will transfer after A-Day. It is a new offense, so all of them except Austin Mack will need more time than just now until A-Day to learn the offense, I'd imagine. Obviously, Austin Mack won't transfer, so that leaves Jalen, Ty, and Dylan. I think Deboer will encourage all of them to stay until season is over and that the competition will go into August camp.