Modified Class D is change for the sake of change and only demonstrates the ignorance and lack of experience in CASA. Over the years, CASA has allowed Airservices management to reduce staffing levels at GAAP aerodromes (cost effective decisions??) to such a point that when aviation activity increased with the recent influx of overseas students, controllers were struggling to cope during peak times.
The fix is simple...increase staffing levels to that required, segregated flight paths for arriving and departing aircraft and a dedicated circuit for circuit training only.
Modified D is not the answer and is only going to place unnecessary imposts on the industry...both IFR & VFR.