There is extensive discussion on Boeing's interaction with the investigation into the 737 accident at AMS in:- NYT: How Boeing’s Responsibility in a Deadly Crash ‘Got Buried’
The conclusions in the 'suppressed' HF report are summarised, with a link to the report at:-
NYT: How Boeing’s Responsibility in a Deadly Crash ‘Got Buried’
In addition, the final conclusion notes the following about design and training, and hazardous out of trim conditions; - relevant to the 737 Max.
Back in 1996, the FAA Human Factors team recommended the creation of interim certification policy guidance, which would fill the gap until design and training guidance material would be complete. It said:
"Specifically, the HF Team believes that the following areas should be addressed by interim guidance: Pilot/autopilot interactions that create hazardous out of trim conditions; Autopilots that can produce hazardous energy states and may attempt maneuvers that would not normally be expected by a pilot; and improved airplane flight manual wording regarding the capabilities and limitations of the autopilot.”