All good points
TD 21. Sharp comments.
I will say this, though I know the diehard fans like duncan2k5 and manybe some others will not grasp it. If he was really awesome, he would have taken that starting spot when he got the opportunity and ran away with it. He only had to beat a guy who was injured coming back at 35 who said he would do anything Pop wanted him to, and Patty, who is a shooter and not a playmaker in the traditional sense or PnR ballhandler who can finish in the paint... just not his game. Bryn Forbes is not that guy either. It was really weak compe ion for him to take that spot and hold on to it.
Once upon a time, Tony arrived in what I hear from reference, was a weak guard rotation. He took the spot and ran away with it. Once upon a time, Kawhi did the same with a forward rotation.
This season he really had the opportunity. It wasn't denied to him. He started games and as you said the inability to shoot is the most problematic, and on top of that the Spurs are a post oriented slow paced team, so that gets exposed all the time.
Right now, he's very well suited to the bench crew which plays faster and more to his strengths. One can only hope he continues to improve and add things. Certainly if he stays as he is, it's just not enough.