I have watched Jimmer play for years. I think he is going to resemble Nash on D. He is going to give a very good effort and be okay most of the time. On Jimmer's PG skills, he can pass the ball better than Harris or Price and on a similar level to Watson.
I'm with Qman on this. He is known for his shooting but he is a decent passer, and he will definitely work on it when he makes it to the NBA.