Thinking about this a little more, I also see a failure here in terms of naming things, which I have noticed in my career can be scoffed at but is so important.

As the article says, the function of MCAS changed and its operational envelope was greatly expanded. What if, internally at least, the new system was referred to as MCAS2?

This is somewhere that things can get political, as was exactly the case with the Max, where they did not want anything to be considered a change to the aircraft type, let alone knowing the MCAS system existed in two majorly differing versions.