The facts so far: the aeroplane was on post-maintance test flight, it ended up at the bottom of Mediterranean sea and all seven crew perished. Thats it, and for the time being, that's all there is to it.
So far no radar plot, no CVR transcript and no FDR readouts were made public, ergo we have no idea what really happened. It usually takes 2-3 weeks after data reorders are recovered to put bigger part of the puzzle together. If some signiffcant issues are find regarding aircraft's airworthiness, emergency ADs are issued at this stage. Whatever is found, Airbus industrie keeps their customers updated on progress of investigation, even if the relevant accident investigation authority shuns the public.
However, by the time we get the clear picture of the events, the story has lost its entertainment value and findings don't get reported by the general press.