Okay, so midterms just came out and this is a definite NO...
Admittedly, I waited a couple days before shifting everything, but the kid is carrying a 2.7 at midterms, so shifting all his minutes over to study hall definitely did NOT help (and he lost 5 points while zero'd out in practice categories)
Which leads me now to wonder if study hall even runs during player injuries or if it just loops over the whole practice plan thing and freezes the GPA in time for whatever it was prior to the injury.