Kaz, I operate 122.4, you'll know how busy it is in the YSHT, YMNG area. You'd be surprised at how many times VFR aircraft fly through dropzones neither on the area or CTAF frequency. Rarely does a call from Centre to a VFR get answered. Stuffed if I know what they're listening to? Airspace violations are a regular occurence, once again, with ozrunways & Avplan how does this happen?
Frequencies are a dog's breakfast now, these changes will make it? Interesting? I don't sit at home reading ICAO documents so I don't know where this has come from? Neither do most of my colleagues.