Initially on seeing the tailplane missing from the tailcone and the skin below the tailplane ripped out, the most likely explanation seemed the jackscrew parting company with the tailplane leading to the tailplane pivoting down and being torn out by aerodynamic forces.
But we now have both exterior halves of the tailplane with so far no joining structure (likely containing jackscrew and hinge mounts).
Given the abrupt cessation of data to the FDR and CVR, perhaps the same event (explosive or structural) severed data buses and/or hydraulics, pneumatics etc for the flight controls, which then overloaded themselves.