Isn't the final failure in all of this the poor CRM. The PIC knew what to do but not once did he take control or announce it.
I'm also a bit puzzled as to how any Airbus pilot would know to do that - take control. As far as we know - every pilot understands stall recovery is the same for all aircraft - nose down. Why would any PIC ever take control when his basic assumption is that the PF is obviously doing the right thing to start with?
He/She would be confused as heck watching the instruments and wondering why the aircraft is not responding as it should. He'd second guess the instruments before he second guessed his co-pilot. As time passes and altitude loss increases, effective CRM erodes, giving way to stress and fear and the longer it continues the less likely the chances of recovery.
The stall procedure in an Airbus needs to include PF's verbalization of the side stick position. 2 accidents would have been avoided by one simple PF call - "Sidestick Back".