WRONG WRONG WRONG.
FS never monitored "all these non tower airports". NEVER. They only monitored AFIZs (and HF, Sartimes).
The system was designed so that “ radio arranged separation” could be used between all aircraft.
Such a system is fundamentally sound! Who in their right mind would design a system where aircraft in the same piece of sky were on different frequencies? Unalerted See and Avoid ie "looking out the window" does not work with large speed mismatches.
The dispute has clearly not been resolved as the RAPACs and just about everyone else other than a few selfish regional pilots do not accept unique 40 mile and 5000’ prescriptive CTAFs
What dispute? The original dispute was the freq to be used at unmarked fields. That has NOTHING to do with charted freq boundaries (it is a pity that someone in CASA added in the 20nm CTAF thingee. That should have been kept separate).