One last item - I had thought the same thing regarding the engines - that high incidence angles would upset the engine to the point of putting the fire out but they both remained operational (and at high power) throughout, until impact.
IIRC, AF447 was GE CF6-80E engines - the CF6-80C2/80E engines are impressively tolerant to inlet distortion. Some other big fan engines would not have reacted so gracefully.
As an aside, we propulsion engineers tend to take a somewhat perverse satisfaction when the engines are operating fine right up until impact in an event such as this (the Aero Peru 757 also comes to mind
). OTOH, Lauda 767 was our worst nightmare
.