One thing that might have been looked at a bit more closely was the weather forecasting.
I am not a fan of the GAF, I find it much harder to interpret than the old area forecasts. I suspect pilots are departing with much less understanding of what weather can be expected than with the old forecasts.
Old forecasts: You knew what weather to expect, but sometimes it was unclear where it would be. GAF: You know where the weather will happen, but not what the weather will be. The report seems to illustrate this point, including the chart from the GAF but not the table with the actual weather.
Also, I have noticed the BOM have a regular habit of issuing a TAF for good weather, and then amending it when the weather turns bad (or just prior). This might be measured in the KPIs as an accurate forecast, but is not much help for planning a flight. That also appears to have happened in this case.