So very easily prevented
They forgot that they were flying an aircraft and set about trying to troubleshoot the messages instead of acting on the basic flight information. All pilots are taught how to stall and recover from the stall to the point where you can recognise the signals and instinctively know how to recover from a stall. I was taught this within 10 hours of starting flying and I still practice it today.
If in doubt about the airspeed indications, most SOPs on the Bus call for 90% N1 and 5% Nose up - it may not be easy or elegant or smooth - but you will maintain a rough altitude in a stable attitude. You will survive.
As Korean did years ago - Air France have a serious training issue on their hands - an issue that needs to be addressed very quickly!
Air Chance......second only to Aeroflot now in terms of passenger deaths per miles flown.