I have to think his options were rather limited. for more than one reason.
The hardest lesson he may have learned so far is when to decide , that someones " skill set " is not good enough.
He was a defensive Guy all along. He trusted Castillo in character. He may have come to realize the limitations and , then adjusted perhaps ?
i have a feel he was watching Daboll for awhile. Pegulas helped make that happen i bet.
Go Bills