To complicated!!!!
I'm convinced after reading quite some comments, that the crash's cause was an inexperienced pilot. Three hours into the flight the captain was probably sleeping in the back. The senior FO ran into the WX trap. This storm was a monster. I assume around a level 5. The airplane fell apart in the storm. Nobody can expect to get out of a storm that size in one piece. I think, not being an airbus friend in general, there is no design fault and the huppla is political.
chris