All you need to do is spend some time monitoring 126.7 in the real world (with a modicum of what Australia calls “traffic”). Any more traffic on that frequency will result in even more garbled confusion.
I used to listen to various Area frequencies for a living, back in the supposed heyday of GA. Lots of flying, lots of training. No CTAFs or MBZs, just Area. Everyone on it. Sometimes grouped up and retransmit on so everyone could hear everyone else. Even then there was not that much radio chatter really. Suddenly we substitute 126.7, GA is dead, no one is flying, the few busy circuit areas are on discrete frequencies, and now you can't get a word in edgeways?