I agree with others that the main problem is his inability to create his own shot, mainly due to lack of ball-handling skills. I'm not really surprised by his low scoring. Unfortunately, for the last two years, he played in a system that exploited his strengths, and he wasn't required/expected to improve his overall game. I think his staying with ISU/McDermott is the best decision he could have made if he really wants to improve his game and possibly make it to the next level. I believe it's not too late. With good coaching and hard work on his part, he can definitely improve his offensive versatility.
I also think that his rebounding, defense, hustle, care with the ball, and leadership are critical to any success the team has this year. He definitely deserves a starting spot. We would be a much worse team without him.