The question isn't what happened - it's why it happened. It is clear what happened - they stalled, wing dropped, they tried to balance it (secondary effect of left roll defo isn't right yaw), they had the spin entry and it crashed. No one knows what begun this sequence of events - they only think. My opinion is the application of rudder didn't help. At best it shortened the petrifying roller-coaster. They were able to roll and pitch before impact, clearly - you can see that, but it was too late. The beginnings of the spin sealed the deal. A 747 at take off has an eye watering amount of inertia, it takes time to do things. Once it was yawed right from that wing drop it was game over - the knife edge turn basically put it in free fall from 1200' with bugger all energy.