Exhaustion?
Did anybody else read between the lines and get utter exhaustion simultaneously from both pilots? I didn't. Surely the tape would have had reference to that. If I was that bloody tired that I couldn't think straight I would have announced it to the other guy. That is CRM, is it not? I have done so, recently, in my present job. (We are encouraged to take in-flight 'rest' when required)
Undoubtedley they were knackered but not to the point of being incapacitated with it.