In fairness, the best way to judge a FO is on the W-L record. I spend my time evaluating specific moves, but there is more that goes into the job than the moves that we see on the field. Based on the team's performance, he deserves a lot of credit. He turned around a team that had been spiraling down the drain since September 2011. He was successful in changing the course of the team, but we will not know if he has built something that will be consistently good and sustainable for a few years.
As for his predecessor, he had a knack for destroying things instead of building them. His record in Chicago in the W-L column has been horrendous. People are giving him high marks for rebuilding the organization, but if he is any good at all, he should be able to manage a .500 record in year 3. He should have traded the Shark. He could have gotten a big haul for him. Theo never could evaluate pitching.