Look at Grayson most of last year. He played too fast/didn't let the game come to him, hurried his shots, etc. Most freshman do this, except for the very, very best. Heck, look at Ingram early. I am in the camp that expects good things from Thornton next year. His D should be great his second year in the system. I also think he is not that far away offensively. He will need to be solid next year on O. A little improvement in each area, not a complete transformation, and he will be just that. And, that team will not need him to be great.
If Frank Jackson is indeed good enough to start next year, then look out!