ATSB have determined it was AWK, fair enough (despite the obvious issue of there being non-essential passengers aboard). I was surprised however to see no mention of the Careflight task management, where the aircrew and medical crew elected to undertake a couple thousand km over-water flight with no alternate nominated, at night, when the patient condition allowed for the flight to be undertaken in daylight. As AWK, the medical crew form part of the operating crew so come under the ATSB scope of examination. A significant contributor to the outcome I would have thought.
On reading the report I formed the opinion that it was somewhat vanilla froth.