Ok, I've said this before,
I've also noticed that his FT aren't a sure thing anymore. Manu is an emotional player and his confidence at the FT line may be affecting his whole game.
1. He is straight up or leaning forward now, he used to shoot it fading away and was much more accurate.
2. Maybe he is trying to change his game, in order to preserve himself. Every player has to in order to keep playing.
3. Isn't he a FA also, maybe Spurs Org. Hasn't offered an extension.