Surely the main take home message from this is it all would have been a non event if they carried more fuel.
How long is a piece of string? How much fuel is enough? Both carried more than CASA regs or their companies policies required.
In order to get them out of trouble, they would have needed enough to get to Adelaide & hold, then go to Mildura and hold, then go to Melbourne or Avalon. All because accurate known information on the weather was not passed to the pilots and because the Mildura AWIS was u/s (again). Really??