What More Do They Want?????
Yes, it appears that the accident happened because the aeroplane stalled because there were no flaps or slats deployed but Ed, you appear to be missing the point of an accident investigation (certainly a civilian one). It is not simply to prove what caused an accident or even whom to blame.
It is to understand every aspect of that accident and everything which led to it occurring, to better understand with a view to preventing such an accident ever happeing again.
Doesn't always work as history has proved but that is the intent.