AF447 was a sad, and unnecessary event. Most pilots cannot understand it. It goes beyond normal behaviour. There is a checklist for loss of all airspeed, and one of its lines calls for 5º of pitch, and climb power. But, the first line of the checklist actually provides an out for literally doing nothing. If you are at a normal attitude, and have a normal power set...then the performance will be what it normally is. You DO NOT need an airspeed input at all to safely fly the aircraft. Not even to land it. The pilot who was doing most of the 'flying' actually used full aft stick, in an attempt to hold this attitude, even though it was not appropriate. In NO WORLD does holding full aft stick for any length of time give you anything other than a deep stall.
All that they had to do was disconnect the autopilot and auto thrust, put the power back to where it had been, hold the attitude at 2.5º (also exactly where it had been). Nothing would have happened and the air data would have eventually returned, at which point they could tidy up and continue on their way. Again, in NO WORLD, does holding full aft stick at altitude give you anything other than a deep stall, and it would never be a recovery that any pilot should consider viable. What was done was the flying equivalent of trying to make your car turn right, by moving the steering wheel left.
AF447 would not have happened if the pilot doing the flying had actually been a pilot. There is no way in which the control inputs he made, and sustained, make any sense.
Unfortunately, Airbus are too arrogant to have 'learn't any lessons'