Probably not as much as leaving any doubt related to what exactly happened to the people and the aircraft. The QPS seemed to be prepared to conduct a full investigation, but they were 'shoo'd' off by CASA, twice. Seems the second dive was at the Coroners insistence but limited to the FOD shield condition. It's only a feeling gleaned from the limited information available but the QPS seemed to want to keep digging. Perhaps, in the end they may be proved right. We will never know.
The following excerpt from the QPS report alone should have created enough reason/incentive to raise the aircraft:
