[Not a pilot] We learned over the Hudson that "my airplane," "your airplane" works well to establish change of control. Is there a similar convention for unexpected events? That is, if over Buffalo the pilot had said "tailplane stall," the copilot might have been able to say, "let's try increasing the speed first." At least the investigators would know what the pilot was thinking after the worst had happened. The same for the possibly suicidal pilot who seemed to be pushing while the co-pilot was pulling. Saying "nose dive" would only help the investigators, but if the pilot were not suicidal, he would have had the chance to offer his view of the situation.
In AF447, if someone had said, "classic stall," (and perhaps this was stated at one point) would there have been a better chance that the pilot in command would have thought to lower the nose?
This kind of summary would not seem to help in cases where the co-pilot was supposed to be calling out, e. g., air speed, but was not, but some kind of impromptu summary would seem helpful in rapidly developing events that do not have an established procedure or where the proper procedure is not immediately apparent.