For him, I think they would be happy if he could simply gain the following:
1. Learn how to be more decisive in the paint. Either pass or go up with it and know when they are defending a particular way for either.
2. Take the ball up strong if close to the basket and get fouls. He already can shoot free throws (even though he looks crazy shooting them - see vw baseball throwing commercial LOL) so that's half the job.
3. Box out!
If he does these three things alone, he will work out well and build on... well add to what he currently does.