To me it also sounds like a plan B if the international sister *AAs are not as servile as expected in providing a waiver for the design.
Having read most of the 256 pages - did we have somewhere a comparison of the implementation of MD11s LSAS and MCAS?
IIRC LSAS hat two computers (left and right) selectable by flight crew? Can't remember if each of those two computers had a left and right channel as well.
Is MCAS and LSAS a good comparison, given that the one is active most of the time and the other only in a very specific corner of the envelope? What does that mean in terms of safety requirements?