Hi,
About the BEA paper: A little time after BEA read VCR, it appeared in the news (a leak?) that the Captain gone back and was heared "shouting orders to his pilots". This phrasing ("crier des ordres" in French) appeared curious to me and I remember thinking was it "shouting orders from the other side of the locked cockpit door"? Inaccurate thinking, but why BEA tells nothing about what the Captain said. It would be very interesting to know what was his perception of the situation, no? Especially after "the PNF tried several times to call the Captain back" was written by BEA (which could mean "between the lines" the PNF was dubious about PF actions).
In very different domain, about the Pitots icing problem: many, here, have given ideas. But there is very simple one, imho. Have one or two "inversed" Pitots, ie Pitots "looking" backward. The precision would be less accurate, as the extent of the measurement scale would be reduced between true pressure and zero, but this would be better than nothing. Why this would be not possible?