I'd say he fits in honestly. He's a jumbo sized ball handler that can attack defenses in multiple ways. Off passing, shooting, in the post, etc. I'm not trying to over hype him also, but I couldn't think of a better fit for Fred on offense than Griesel.
@Fullbacksympathypointed out Luka, but I'll point out Dalano with Fred. When Banton was at his best, the offense executed at a very high level. That's where I think Greisel can fill in.
Now, they'll need another ball handler for it to be successful, and Trey is trending in the right direction right now. You can run different things through either guy and be successful. Again, I think he's a perfect fit schematically for Fred.