He needs to PLAY. He won't play in SA, because he's not ready. He WILL play AND learn in Austin. Austin doesn't ever have back to backs, and frequently has 2 or 3 days off, and time for practices. They can work on his D, teach him about the line between the ball and his man, and don't stray above that.
Next year, everyone will be raving about Lonnie, and ing because our new rook(s) will be in Austin, just like they're currently raving about White and ing because Lonnie is in Austin. FIGURE IT OUT. This is what has worked for nearly a decade, since they drafted Cory Joseph. This is the process that arguable the best development staff in the NBA uses, and it works.