Also, the thing about the Spurs is their problems are evident and can be fixed without anything besides players just playing to their normal level.
Spurs don't need Jefferson to be this ultra efficient 4th option. They need him to be aggressive, run the break, defend and rebound. They also need him to get to the FT line and occasionally carry the team when people are struggling. He is capable of doing all of that.
TP just needs to get healthy and acclimated. He should be able to do that.
Manu is the only really big question mark. The Spurs need him to be close to what he was and he is the only "problem" that seemingly might not get fixed. We don't know what level Manu can reach yet. This is the biggest concern.