So because he hit a three, he's better than Rivers?
Perry Jones is in the same category as Rivers and almost everyone else you've been talking about--trying to make it as a rotation player.
I recommend reading this article:
http://www.bourbonstreetshots.com/20...hornets-picks/
Historically, late lottery picks give about a 50% chance of being a useful NBA player, and less than a 20% chance of being a star. Your expectations of a late lottery pick are far too high.