Enes Kanter is not even near his potential right now. Kanter was better passer, before he came to the Jazz. With Kanter and passing, it´s a bit like Kanter and jump shots. In his first year he never got the oppurtunity to shoot the ball. He never got the green light to make plays, when he played for Corbin. H barely startet trying some difficult passes and and plays. He will improve with time and get more confidence...
https://www.youtube.com/watch?v=e3ZtUvAhzuQ
3.35-4.13 he makes a couple of good passes, he just never got the opportunity to improve on this area... With 18 yaers of age, he was capable of making some difficult passes. It´s not like Kanter just hasn´t improved in this area, he got worse.
Being a good passer isn't about making highlight passes, it's about consistently making the right pass w/ accuracy and timing.