While I did feel he made a mistake going early as he did and in truth I was not a fan of his parting comments, he IMO was never really a NBA level talent. He is uber athletic but you need specialized SKILL to make it in the NBA, tons of athletic kids out there not so many with the specialized skill the NBA needs. For the record, I am not suggesting there are tons of guys out there with JP's level of athletism but maybe he picked the wrong sport? Imagine him as a wide receiver with that leaping ability.
This much I do know, if you struggle to jump shoot it is hard to grab a spot in a NBA back court, if all you can do is jump shoot but you can do that at a very high level you can catch on in the NBA, Reddick is still cashing NBA paychecks...