Takata;
It seems to be a BEA concern that FDs were not set OFF as per UAS procedure as they were comming back many times for a while (They are not sure about the effect or indications given to PF). It is still a work in progress at this point.
My understanding of the FDs is that they reflect data being sent to the FCPCs by the FMGECs. At this point, the raw data on the PFD would be the most important thing to look at - the FD's would not be presenting useful information. However, as we know, they may have tried to use the FPV to confirm what the VSI was telling them, and we know it didn't work because the FPV was not available at the time.
The simulator sessions probably have helped here I would think but it is very much a work in progress which much remaining to be understood concerning Phases 2 and 3 of the three phases indicated in this report. Phase 1 stands alone as a topic of great interest, in my view anyway. At some point, a formal calculation needs to be made, (I know that some calculations have been done by some experienced engineers), as to whether the aircraft was recoverable after the stall had fully developed moments after the apogee with AoA >16deg, (
meaning stick held fully forward, engines at idle thrust, until very clear indications of rapidly increasing speed were obtained), and whether this would be moreso if the THS were rolled forward, and if so, to what setting.