Hi Machinbird;
Re, roll sensitivity vs pitch in Alt 2 Law and your observation, "This is an undesirable combination. "
No, the difference is a matter of degree, not of characteristic. Both are eminently controllable but the flight controls also respond to large, quick inputs just as any aircraft would. These inputs were, for whatever reason and by all accounts, very large and very quick...sufficiently so as to cause the stall warning to trigger twice. Again irrespective of the reasons which may be found in understanding of high-altitude flight, training, experience, HF and technical/aircraft, this qualifies as mishandling the airplane. 'Why', is, as we many realize, is the question, which implies at this stage nothing regarding the PF or the airplane or ?, except a need to understand.