And another thing. The ATSB completely ignored the role of the CAGRO during the incident. The CAGRO didn't assimilate the potential conflict between the Jabiru and the A320. Now perhaps that isn't their job, but their job at least, I would have thought, would have been to be aware of the Jab (who did make a radio call), find out what they were doing, and to query the A320 when it didn't respond to the Jab's call passing abeam Lismore.
And another. There seems to be a misconception in the ATSB about how See and Avoid is actually employed. A note in the report says:
Pilots are responsible for sighting conflicting traffic, and avoiding a collision, having been alerted to the presence of traffic in their immediate vicinity. This is principally achieved via radio communications.
That is not the way it is done in the heavy world. We "avoid" first, then "see".