My impression is that since Mull of Kintyre - which was about the first time I had detailed sight of investigations into a military accident, the MoD has changed its approach massively and has become far less overtly secretive.
Apples and oranges in this case. The MOK was a Board of Enquiry and we are discussing Courts of Law (I think) which are very different things.
That said we seem to have more than enough Legal Eagles hovering around now and I ain't one (nor have I claimed to be one) so I'll get me coat.