Vessbot,
One item I haven't seen in all these discussions is the flight directors. The report says that they disappeared along with the autopilot disconnection, and then reappeared and disappeared several times again.
The appropriate question is, why didn't they turn them both off? The reason why they should be off is because they are being fed erroneous data that the pilots should not respond to.
Air France A330/A340 Abnormal Procedures
“Unreliable IAS” in force at the time of the accident
PF AP..........................OFF
CP FD1 and 2................OFF
PF A/THR......................OFF
PF Set Thrust................CLB
PF Set Pitch..................5º