Castle's shooting is the key. If he's still at ~30% at the start of the season, I don't think Jeremy can start.
I wouldn't mind him as a SF, my issue is that most people suggesting him want to slot him into that PF position, which just can't work since he's a 4rpg forward.
Ideally, I'd keep both Barnes and Champagnie, while getting another 3-D forward.
No place for Devin or Keldon.
Fox/Harper/Castle three man guard rotation.
One legit forward and probably the #14 pick alongside Barnes, Champ and Jeremy for forward positions. Spurs won't get rid of Jeremy, I personally think he's beyond saving if he doesn't develop a functional jumpshot over the summer.
Wemby and a reliable backup.
That should be enough to have a fully functional roster and make the playoffs. We see what we have then we fix whatever needs fixing for the 26-27 when we should be legit contenders. Healthy Wemby will surely be a top3 MVP candidate in 26-27 season.