Nice analysis.
Even if they played mostly against bad teams, Spurs are looking better than they did few weeks ago. Spurs are a damn good offensive team and there are still room for improvement.
However, there is one stat that is plain scary:
Spurs are right now 15th in the league for points allowed in the paint with 41.2 pts/game. That's bad and it's even worse when you also consider that Spurs are playing at a slow pace. As long as they don't fix that, I won't consider them as a serious contender.