But did SWA understand that the system had morphed to complex?
Perhaps SWA were trying what they understood MCAS to be.
Remember that MCAS started out as a simple stick nudge like the KC-46A and the 707s for UK approval have. But it morphed to aggressive, and that morphing was not well communicated - indeed some Boeing people seemed to not grasp it, Boeing failed to revise safety analysis.
Does Schiavo lack imagination?