As you almost certainly have already seen, JD at Red Reporter put up a post about the excellent numbers of Carlos Guevara in AA Chattanooga. He hypothesizes that the reason Guevara hasn't been given the opportunity to prove himself in AAA Louisville is because general manager Wayne Krivsky is a dyed-in-the-wool seamhead who can't overlook the guy's height and lack of plus off-speed stuff to notice that he's getting results.
I have the sneaking suspicion that JD is on to something there. The refusal to acknowledge the numbers is the baffling deficiency of the scout. Surely there must be some middle ground here, where you can follow your gut with due consideration to the numbers.
That being said, observing the actual results isn't exactly the strong point of the statheads either. The obsession with removing luck from the picture discounts the very real part that luck plays in the game.
Perhaps a simulation of each key personnel decision in Celebrity Death Match format is in order.