Sometimes it is very good to go back to basics. => I have read the lot, and the focus is on the wrong point
IF, and I say ; "IF" , no AOA sensor had failed, not a soul would have heard about what the MCAS was / is / is going to do.
All these events start 'or are triggered by" failing AOA sensors. => And naturally the single probe problem MCAS surfaces, and then what MCAS is trying surfaces, but it all starts with the failing AOA SENSOR/system.
The MAIN FOCUS should be on WHY the AOA probe/system fails.