Thank you, yes AoA sensor which continues to have a high failure rate was the root problem, compounded by the overly-empowered MCAS system and a setup of Trim cutout switch whose function had changed and did not stop the MCAS trimming as expected. Boeing fixed the MCAS system in June of 2019, no one seems to be addressing the AoA issue, the rest developing training and paperwork to satisfying the now embarrassed FAA.