To clarify: my comparison to Caleb was based on Luke's physical maturity, his rebounding prowess, and the hopes that he might become a transformational acquisition along the lines of Caleb so many years ago.
I don't have any idea if he is a back-to-the-basket or face-up player at this level. I would just be happy if he can grab some rebounds on both ends, make some stick-backs around the basket, and defend bigger opponents without getting into foul trouble.