Sorry to sounds dense, but...
(1) Is it not part of the problem that this FAA AD hasn't been mandated by UK CAA? Or am I missing something?
(2) I think we all accept that the LAE in this case was still negligent. How negligent, and whether his punishment was appropriate is a separate question. Given that, would the changes to procedure, proposed by AAIB, and rejected by CAA, not have given a much better chance of his failure of procedure being picked up and prevented from causing this tragedy?
G