Aside from all of the transfer/recruiting elements, I would send anyone promised minutes for next season to "Jake Sullivan School." 6 months of 1000 shots day, under Jake's stark supervision. Wrist, elbow, rotation, "shooting instead of thinking," etc.
Will this magically turn any of these guys into Steph Curry, or even Matt Thomas? Of course not. But why would this aspect of the game not lead the list of "If you're not getting better, you're getting worse"?
Slagging players for poor shooting, or just accepting that they're poor shooters and trying to band-aid it by supposedly emphasizing other aspects of their game, is not fair to them, and is basically negative reinforment.
I really believe some of these guys, e.g., Gill, can become more than just adequate 3-point threats, eg. Turn two or three 25% guys into a 34% guys, and then we can talk about "becoming UVA or Villanova."
Now, the play of the bigs? That's a whole 'nuther can of worms.