Welsh - a good summary, I would, however, make the stall warning item the third type-related issue, and really what other types/manufacturers 'do' or 'did' is not relevant to this occurrence.
As others have said, 2.5 deg/5 deg.emergency/non-emergency - no matter, none would have caused this crash, but 11deg did initiate it. There are enormous holes in the 'French' cheese in this accident, and Dozy sums up the HF neatly in his middle para. I am still greatly puzzled by the lack of assertiveness of PNF.
Lots of new cars for the lawyers.