Doesn't seem like there's any vision in this merry-go-round of using 1950s technology.
One day someone will reinvent ATC/broadcast radio to the extent that you'll be able to select an appropriate context when transmitting, and such communication will be on a store-and-forward basis. No more overlapping transmissions!
1. ATC only communication
2. Immediate area broadcast (say 20NM) (GPS-based) - for coordinating intentions (e.g. high traffic density areas that were MBZ/CTAF(R) - eg. tourist areas). This could be context sensitive to your location too, so if you are near one of those MBZ-type areas the boundaries of the broadcasts would be expanded as required)
3. Terminal area broadcast (inbound/turning/taxi/rolling calls)
4. Company comms
5. Emergency broadcast
The good thing about this is - there are no frequencies anybody needs to know. It selects appropriate transmission/receipt systems automatically and is multi-frequency/multi-technology and also mesh-based. All aircraft, ground systems and satellites in the system would act as a giant mesh for storing and forwarding messages. No more lost transmissions!
To minimise calls, ADSB-In and Out will be extensively used. With a preset destination, intentions are automatically broadcast too, so aircraft converging on an aerodrome will have nice situational awareness of that, but those overflying won't get any clutter. Similarly for enroute navigation you only see what you need to see.
This would revolutionise radio communication/allow playback and with all messages being tagged with callsigns etc. it'd be like having an inbox of radio calls, filtered to show you things only you need to know and vastly remove clutter.
This just needs someone to develop it at an affordable price point.