AF 447 Search to resume

[Machinbird]

Consider this from page 86 of BEA accident report on A-320, D-AXLA

The Captain controlled a left roll movement, caused by the stall. The aeroplane’s high angle of attack and the roll movements generated asymmetry, and a speed variation between ADR 1 and 2 appeared. This increasing divergence caused a rejection of the three ADRs by the FAC then the ELAC. The flight control system then passed into Direct Law. It is likely that the crew did not notice this due to the emergency situation and the aural stall warning that covered the warning of a change of flight control laws............

Now assuming AF447 somehow departed controlled flight while in Normal Law while cruising on autopilot, does anyone see anything in the ACARS sequence that would preclude this type of scenario? (other than the vaunted Airbus protections). Loss of autopilot and autothrottle would be due to the ADR failures which would be caused by the departure from controlled flight.
The RTLU position equating to M 0.8/272 KT would then make sense.