I don't think anyone should write off his shooting either. His shot isn't broken. For me it's about where you take him and his relative value to other prospects. Buzelis is at the top of my Spurs board, but he doesn't fit as well with Castle. I'd rather pair Risacher or Williams (maybe even Salaun) with him than Buzelis. My opinion on that has to do with having a Castle, Sochan, Buzelis SL. If we moved Sochan I'd feel better about a Buzelis-Castle pairing.
If we go with two guards my favorite pairing is Castle-Sheppard. I think they would mesh very well.