Why they discuss (all 3 pilots) all the way down about keep the wings level and the speed.. but not about all the blue they must certainly seen on the instrument ?
Simple answer to this question. When the bank became excessive, the sensation of down became well off to the side. If the Captain was standing between the seats, holding on to head rests, he would have trouble remaining there. The wing was no longer carrying much of the aircraft's weight. The missing lift was replaced by the drag of the fuselage so that the aircraft was at a relatively stable speed (but velocity vector pointed very down).
To summarize, it was as if the fuselage had rolled partially onto its side while on the ground. Hard to maneuver inside like that. That was having an immediate effect on everyone's ability to function.