I believe the psychologists tell us that when we become overloaded the first sense which the brain "deletes" is that of hearing. This has happened on several incidents where, for example, the non flying pilot has been making comments on the operation but the flying pilot has not "heard" the comments.
I am not saying this has happened with this accident but you can have all the aurul callouts in the world going but if they dont reach the brain(s) of the humans they are unlikely to respond in overload situations.
Without prejudging the full report I think this accident only goes to prove the Swiss cheese model -it's never one thing but when all the holes line up.......