We don’t at this time know that the crashes are due to a software “bug”. There are certainly things that I certainly don’t know.
When an aircraft in auto-flight behaves strangely the pilot drops paddles and flies the plane. Does shutting off auto-pilot also shut of MCAS or must that be done separately? Since the pilots seem to be in the dark about MCAS I would think that it would be one action or how would they know to shut it off and how? I don’t know, do you?
Is the aircraft actually unflyable without MCAS or do normal control laws still command the proper actuators when pitch up? Manual flight capability is part of cert so I would think the aircraft is flyable without any autopilot.
Do we even know that the “patch” is even about the MCAS or could it be an improvement in redundancy management for an AOA data mismatch?
You cast quite a bit of shade with pejorative terms like paper over, flaw, too ambitious, etc. before the investigation is complete. I enjoyed your article, but as I wrote, I think it premature to cast judgment before the investigation is complete,