You know, I always thought Davis had a nice knack as a play caller. I didn't like the conception of his offense, his ideas just didn't blend effectively with KF's philosophy. But within the offense that he conceived, I thought he was able to keep defenses off balance.
I much prefer the offense that BF was trying to coordinate, I just don't think he had much knack as a play caller. It was okay the first few years before tendencies were established, but I think every DC pretty much has him pegged, and he has never shown the ability to zig when they think he is going to zag. I also think the offense is too complicated for the players to execute at a consistently high level, too much thinking required on the fly. That is a good thing for preparing for the NFL, but it weeds out talented kids that could otherwise contribute.