I very much agree with totempole.
Flying for an outfit who displays its infinite wisdom by not providing any seat possibility for augmenting crew but the two jump seats, i could give ample testimony of "stunned" or "stumped" operations induced by moronic utterings from an overcrowded cockpit.
I am all for having more hands on deck if the skipper so feels the need. My former employer handled it correctly by stating that it is his call to have the supernumerary in or out of his cockpit, but this implies a proper seat for the supernumerary (which by the way is the only civilised and respectful way for airlines).
As has been mentioned, the training in a two man cockpit layout is exactly that: Two men/women. OZ heroic handling or not (I actually don't think it increased safety, only flight time .....)
with the ever increasing fatigue factor on such cockpits, we should stick to what we learned and trained. Every deviation is a disturbance factor when tired and stressed.
No excuse though for this AF crew, only an explanation for the hick-up.