Interesting question Creamy....
Can you confirm that in the system you're advocating, the default CTAF frequency is the same frequency as what is currently the area frequency in G? It's a yes or no answer.
Now, not wishing to rubbish your legal speak, but the default CTAF frequency for the past decade or so has been 126.7, the Multicom, not the area frequency.
It is a sad indictment of the education and the process that has obviously left many of the posters on this thread showing their collective ignorance of what has existed for that time. Even CASA don't know! And whats more it has worked quite well in that time. Now they want to complicate it....!