My 2c. Providing the following principles are met I don't care what they do:
1. Major principle:
People roughly in the same areas should be listening on the same frequency, not different ones.
2. Secondary principle:
a. Areas where a lot of traffic is brought closer together for a common purpose (busy aerodromes, transit lanes etc) should have a discrete frequency.
b. Areas where congestion might be an issue (sydney basin?) should have a discrete frequency to avoid too much chatter.
3. Use of radio
a. IFR aircraft need traffic information for separation.
b. VFR should generally monitor rather than broadcast however common sense should be used. In places like aircraft lanes, aerodromes etc appropriate radio procedures should be used.
c. All aircraft should be able to request appropriate information or services relevant to their level of operations, if required (eg for VFR requesting changes to sartimes, QNH, wx updates etc)
d. Radio transmissions should not be used in place of lookout for VFR (the number of calls sometimes made operating in the circuit in some CTAFs where aircraft repeatedly call every circuit leg come to mind
).
4. Same hymn sheet
a. People should be able to readily find the appropriate frequency to use for their location and operations.
b. People should be able to readily find and study the standard phraseology for all the typical radio transmissions appropriate for their level of operations in the AIPs (and duplicated in the VFG).
How hard is that to implement?
Is the existing system that bad? [shrugs shoulders]