I've been starting to get pessimistic about his development, but this article gave some good insights into how he is adjusting to the NBA.

http://www.si.com/nba/2015/03/03/dante-exum-utah-jazz-the-craft

I really like the approach the Jazz have taken towards developing him. I think that he'll benefit a lot from being on a team the next two years where Hayward, Favors, and Gobert are the "stars", and make the team competitive.