I think it's just unrealistic from a scouting point of view. You can watch a player play and determine their current skill level, and you can estimate the potential of a player but you don't know for certain.
Take Wemby for example, scouts are saying he's going to be a ATG but he might get to the NBA and only be a MVP potential player (equivalent to a regular NBA all star?)
So i think having a way to 'scout' exact potential is just unrealistic, if that's what BB is trying to emulate