Keeping it under control
Light, Moderate, or extreme -- doesn't really matter. What really matters is how prepared the pilot was to handle this unique situation. Hand flying in turbulence when everything goes out.
I am disturbed that it is not permissable to "hand fly" the aircraft in real life let alone the simulator/and or duplicate the "emergency" that they encountered in training.
I can't imagine a new guy, or inexperienced guy, being able to keep this thing under control under these conditions. Even if it was benign.
That's what training and testing is for. So far I see no evidence of it.