Going back to a post by Ian_W
http://www.pprune.org/6542805-post525.html, and a discussion of cognitive overload.
The response in the human under this pressure can often be 'cognitive or attentional tunneling' where everything except a small portion of the inputs to the brain are just not seen/heard.
I imagine most of us have experienced this effect where you effectively 'turn off your ears so you can get some room to think.'
It seems to me that the aircraft didn't just say - 'You have the aircraft' - every system on the aircraft had to say something plus many of the instruments. The cockpit displays are not analogue gauges which use the spatial analysis cognitive channel, but are textual requiring the same verbal analysis channel as the aural verbal messages and the ECAM text messages.
Underlining by me for emphasis. One of the AF447 issues may be that the aural stall warnings leading up to the actual stall were ignored because of "verbal analysis channel overload".
The stall warning is one of the highest priority warnings in any aircraft. It deserves its own mode of communication.
The F-4 had a very nice stall warning consisting of an excentric weight mounted on an electric motor attached to the left rudder pedal. When warning AOA was reached on our single AOA sensor, you received a brisk foot massage. Unfortunately on a transport aircraft where it is completely realistic to be flying with your feet off the pedals, rudder pedal shakers cannot be depended upon to convey the message.
The DC-10 had a stick shaker of similar principle. Unfortunately the Airbus A320/330/340/380 have a dinky little stick that can be highly sensitive to motion, so stick shakers are out as a means of conveying a stall warning.
There is another part of aircrew anatomy that is available for receiving the message of a vibrating stall warning effector, the part that they sit on.
By vibrating the seat bottom, the crew could receive a stall warning message through a tactile mode of sensing and not add to the cockpit uproar.
Of course, it is important that AOA warnings are available while weight is off wheels, no matter what the airspeed indication.