Would it be possible to have a single switch that disables all automatic systems and puts the plane in complete manual control as much as possible? Can these planes even operate in a complete manual mode?
Boeing consistently has preferred more-or-less manual controls, while Airbus took the other direction (in which the pilot guides the computer, which operates the controls).
All airlines can fly happily in completely "manual" mode. Boeings are doing this most of the time, Airbus's only do this when the situation is outside the computer's envelope.