All good common sense thoughts: which brings me back to an earlier question, why have the manufacturers, seemingly, jumped up with a quick knee jerk change to QRH? I sure there are some 'grey beards' in Seattle & Toulouse. Did the legal boys have louder voices? IMHO this issue is deeper and more complex than a 'quick fix for all occasions' type solution.
Just a thought: we've only mentioned Boeing & Airbus in this discussion; what do all the other manufacturers have to say about this unreliable airspeed scenario? This is possible in any a/c. What does Embraer, Canadair, Biz-jets, recommend?