Boring I know but I will wait for the investigation to publish a report.
As far as BOM forecast accuracy, they get it right much more regularly than getting it wrong, only some of you guys seem to forget that. Sure, getting it wrong has implications such as we see here but that is why the PIC makes the final call about fuel load, not BOM. I am always amazed HOW accurate BOM get winds aloft and cloud base etc.
Ultimately, a safe outcome with some lessons for all, and cheap too.