Just a thought from a practical and safety issue, for traffic information could I suggest some fixed ground references be used, even if there abeams.
I remember years ago getting traffic on a VFR aircraft who was tracking direct with his new fangle GPS and when I asked him for his position, he said, 350nm on the XYZ radial, totally useless to me. I then suggested he open his map and look at his ADF. Even in modern jets, we are always having to be aware of our situation and and surrounding traffic.
Sorry I'm not familiar with CASA requirements these days as I've been away for too long, but I'm sure with comonsense and and good SA, it can be done safely.
Happy flying