Gilless:
Sleepdiver
I agree with your comments on speculation. There are too many Monday morning quarterbacks around here. But even with speculation there is education. I wish the speculators would be patient until more data is released and real analysis could be done. But speculation is a feature of the human species.
You appear to live in this strange fantasy world where there are authorities responsible for digging down to the bottom of every scuba diving fatality, interviewing all the participants, going over the equipment and writing up a dispassionate and accurate analysis. No such agency actually exists. The rescuers on the scene are mostly concerned with getting enough information to hand off to the cops and the doctors. The doctors and cops are mostly interested in ruling out foul play and then determining if it was equipment malfunction (possible lawsuit) or natural causes (drowning, embolism, etc).
Nobody official involved cares about accident analysis and preventing future incidents. There is no authority figure to look to. We are alone.
You can wait patiently and you will never see the data and analysis that you would like to see.
I think you may want to recheck your facts on autopsy requirements. Laws for such things vary by jurisdiction and and many areas have multiple jurisdictions or laws that may apply.
The results of autopsies are almost worthless for accident analysis. The incident I was involved in it was useful to get the autopsy results since it was death by embolism and meant that she was gone before we ever got to her, which helps with rescuer guilt. The autopsy only confirmed some minor factual details in the accident chain, though, and didn't do much in terms of the actual accident analysis. Most of the mistakes on the dive were made long before the lung injury occurred.
"Don't speculate until we get the autopsy!" and "Don't speculate, let the authorities do the investigation!" are completely naive ways to approach accident analysis of scuba diving fatalities. It seems to assume a world-view where some authority / parental organization will always be responsible. I know that in the incident that I was involved in I know a lot more than the medical examiner, the cops, the coast guard/EMTs or anyone else "official" about what happened. In real life nobody has the official job of asking "why did this occur?" The "facts" will likely never come out, and there will never be a publication of an accident analysis. For the incident that I was involved in the only person who wrote up anything resembling an accident analysis was me. I was in a good position because I towed the gear in to shore while escorting the buddy and getting a full debrief. As the basis of real accident analysis that is flawed, but it doesn't get any better.