Wow....way premature to call out the kid with some of these labels. What we do know is he's very young, he's not NBA ready, he has to work on his body and he's inexperienced in the NBA game. 90-95% of the draft picks are not ready for the NBA. Most of those picks shot under 40%. Patience man patience.
That's not true. People are about equally split on jumping the gun or just using the blanket "he's young" excuse with prospects, but that's nto teh way it works.
From a young age certain traits are near immutable, those you can know because they are just inherently part of a guy. Then other traits (actually closer to skills) are much more mutable and can change.
Immutable traits:
height/length
athleticism (except as impacted by weight)
hand-eye coordination
toughness/aggression/physicality
Traits that are established very early, typically before we ever get to see guys:
rebounding prowess
ballhandling ability
shotblocking instincts and timing
basketball I.Q./innate understanding
Traits that can sometimes be learned/changed:
shooting skills
post moves
how to set a pick, or use one
how to run the pick and roll etc.
weight gain or loss
Papa can lose weight and learn the bottom skills. There are very few (as in almost no) examples of learning the upper traits (and they are closer to traits than skills, that is the separation).