Excellent post GBO.
Possible extra failures to consider are….
Loss of flight instrument screens due to the power coming from TRUs in the vicinity of the bottles. TRUs located in E3 rack.
Loss of pitot/static feeds to the flight instruments causing flight controls to drop to ‘secondary mode’. Causing autopilot and autothrottle to fail. The aircraft could then just meander on with no one at the controls. Its natural stability keeping the aircraft roughly straight and level.