Re: Lack of systems thinking
Some of the comments on the Pprune threads linked above make your point about considering the whole system. It does look a lot as if Boeing added MCAS to get around a certification problem with the 737 MAX but didn't consider all the potential interactions with the rest of the 50 year old design. It's also quite worrying that it only uses 1 of 2 AOA sensors* and doesn't even do a comparison with the other one to see if the data is valid.
*It swaps the in use sensor every flight, hence the previous sector not experiencing the same issue with MCAS, although the other faults were still manifest.