Couple of general points to suggestions that have been made in this thread.
~ Kanter does, in fact, have a lower confidence in his shot right now. Having said that, it's not in his shot, per se, but rather in the level of competition he's playing against .. for the first time. He's a little overwhelmed in how much more quickly a defender closes out and their athletic ability, compared to that of his prior experience. To be clear, he has confidence in his shot and has confidence he'll get it together against this level of competition, but understands it's an adjustment. He admits that right now he's over-thinking things rather than just playing within the flow of the game. He was used to thinking, "no one can stop me", but is now thinking, "how can I not get my **** blocked.
~ He is anything but low bb IQ (offensively) .. he just appears that way at times because of what was stated above. Also, he was used to be asked to score the ball, go strong, score or FT's. Now he's having to get used, for the first time ever, to be a complimentary player on offense. Doesn't mind the role, at all, but learning it.