He's always had that mid range shot though and been a willing passer. I don't think those explain why he's just drawing fewer shooting fouls.
I think he's just less explosive and able to finish through contact. He's a few years older and has a foot injury (and his catastrophic ankle injury two years ago), so its not a huge surprise. But its the one big area where he's not matching his all-star production.
His last year in Utah he exploded through defenders a lot more trying to dunk on them or finish strong. Just doesn't have that same aggression or hops in my eyes.