He just turned 19 so no im not worried. I think he will gain some weight as well as improve in all aspects of his game once in the nba a few years
Sure on all that.
You can learn a lot about an athlete by the way they catch lobs. World class athletes like Lebron and Kobe go in one fluid motion and time the pass while in the air. Guys like Wiggins and Marvin Williams have to do that hesitation hop to time their jump when going up to get it. The same thing happens when he's driving to the basket. He doesn't seem to explode in a fluid motion and needs that hesitation hop to set up a good leap to finish strong. This is the reason Marvin never turned out to what everyone thought at the time (he was also 19 but bigger and 4 inches longer than Wiggins).
https://www.youtube.com/watch?v=LXt5JtlWnps
I see him more of a Durant type though so maybe it doesn't really matter. It's just a whole lot harder to judge than a natural world class athletic ability.