I have always wondered whether bringing up the flaps to G/A configuration would have significantly changed the outcome, Vref 30 +5 being roughly the same as V2 flap 20.
( I write this as a retd 767 Capt with no experience of the 777). Has anyone done an in-depth analysis of various scenarios in the sim? If not it should have been done as the situation was outside any QRH action so walking away was a success whatever they did.