I wouldn't be surprised if he has a down year in stats even though he should be a better player. We will have more height and talent in the SF/PF/C position next year. He could lose minutes or shots/game.
Call me skeptical but we heard this about Mel from his freshman year onward. Beyond being able to get more rest and not having to play through foul trouble, I don't see there being much difference in how Fred uses The Closer.