Would concur - I think this can be done with strength conditioning without "bulking him up[" - you can be strong and execute those moves without adding 20-25 pounds. I like the fact that despite his height - he can move well, has moves, and a solid shot. His size can help with defense - which we need - and he can also be an outside threat that would be hard to defend against.
Not that he's going to be KD, but whenever I think of tall, lanky, perimeter based college forwards Kevin Durant comes to mind. Famously couldn't bench 185 at the combine, but that didn't stop him from straight dominating as a freshman.
Looked it up, he was listed at 6'9 215 at Texas.
He's listed as 6'10 240 right now.
I think Vlad came in at 205 his freshman year and put on something like 25 lbs by his sophomore year. He got down to 215 as a senior at American. He's 231 lbs right now.
Jones is coming in at under 200 lbs it looks like? At his height, you probably would barely even notice if he got up to 215.