The world is going to stop spinning on its axis since I'm going to the mat for Buddy...
Buddy had size, had form, and could square up his shot in a hurricane. At the end of a shot clock, Buddy could get a shot off, albeit a contested one, that at least had some shot at going in, while being the guy that the D was focusing on (again, albeit because he was taking a lot of the shots).
Joe's shooting improved because his role was vastly less demanding than Buddy's (for better or worse) and he exceled, somewhat, on the offensive side of the ball.
If Joe is taking 50% more shots than everyone else (which is what Buddy did last year) and having a huge usage rate, I think his efficiency will fall off a cliff. Joe may be able to dribble a bit better than buddy, but he's not exactly Steph on the handle. He's also undersized and isn't exactly a stamina warrior. You want to talk about limitations, that is just the beginning for Joe.
Again, I'm not saying Joe is a bad player, but you try to make him a volume scoring star with a high usage rate, we're toast. He'll be inefficient on O and that's all before talking about his defense.
I get the hype for the new team this year. The unknown is always exciting and has tons of potential. But while I think Buddy's abilities were overrated last year, let me be clear - you put Joe in that same position and we'll drive off a cliff.