If the Coroners Court of Victoria has a clue about airspace arrangements and procedures in Australia, I'll give money to charity. If the Coroners Court of Victoria is inclined to learn anything about airspace arrangements and procedures in Australia, we can safely predict that the Coroner will 'reach out' to none other than Airservices and CASA, both of whom will fall over backwards to show that the pilots were entirely at fault.
The families of the deceased need to engage Counsel who has some experience in aviation in Australia and that Counsel needs to engage someone like alphacentauri to provide qualified expert submissions to the coronial inquiry. But even then, a Victorian Coroner's recommendations about airspace arrangements and procedures will gather dust in Canberra.