Things look very different now than they did a few months ago because of the play of Mac Jones. Then, a whole lot of people assumed that Tua would be in the NFL and that BY would be the starter next year. Now it is clear that BY will have to wait, and he will be 3rd string if Tua comes back. If Tua comes back, will Mac transfer?
With Mac and Tua both playing next year for Alabama, BY gets no snaps. Taulia would likely be the 3rd string QB. That would put Maye and BY on pretty even footing and make the decision easier for Maye to stick with Alabama. Pretty much any other scenario - you lose Maye. Any scenario that provides BY with a decent number of snaps next year would put Maye behind him, but BY would still have at least 2 years to play. Would Maye stick with Alabama and hope to play as a junior or senior?
So, if Tua stays and Mac transfers, you probably lose Maye. If Tua leaves and Mac stays, you probably lose Maye. If both stay, you could keep Maye.
JMHO