I've always tried to argue that some knuckleball education could have widened the scope of backup catchers available. I don't see why Thole is such a special talent that he, and only he, can catch this thing. But there's an argument to be made that as volatile as the KB already is, it's still probably better to have a steady, proven guy catch it. Dickey still provides both quality and endurance, so if it costs the roster spot of the backup C to ensure there's a competent and trusted battery mate in the clubhouse... I guess it's fine.