If there was some loss of tail rotor control, would the canted tail rotor and its complex yaw/pitch coupling of control inputs have compounded attempts to control the aircraft and get it planted onto the deck? A loss of lift at the tail might explain the slice in the aluminium alloy decking, seen in 2 of the photos, roughly radial to the landing circle.
The crew did well to keep it on deck, once it had made initial contact, and not hit the nearby crane. Or worse.