I'd say that role doesn't suit him.

I don't say I'm right but I try to find a solution, at least based on his earlier matches and not just Juve ones.
I think he had a better regista role before, when he was also more involved in attack. He was using his creativity, taking long shots and running back to get ball much more while here his game looks pretty simple and different, based on center of midfield where he dictates the tempo and plays short passes.