The VS on 447 didn't part as 587's did. The likeliest explanation is that the Clevis/Pin points were strengthened as a product of 587's failure. Catastrophic failure isn't complex, it occurs at logical weak points. If the pins, web system of the 330 has enhanced structure, what's next? The next mating structure, in this case a combination of box/tower 'blocks', with their insertion into stringers, bulkheads, and decking.
The most probable origin of the energy was airflow impacting one surface of the fin/rudder at an angle that surpassed design load and then failure point. Laterally. Longitudinal failure I think is a far more remote possibility.
If the failure happened at altitude, and the VS/Rudder was resisting a yaw, the lack of controllability in this axis would cause a roll, and it is unlikely to have been recoverable. The a/c would then... well, most likely tumble. imo. sorry