Hi Ken, I don't know exactly what particular decorations you're talking about, but I suspect you are talking about military decorations, which are not in the scope of this proposal, only civil decorations.
As you know, there was a recent proposal on G2G covering all (both civil & military decorations). If I recall correctly, that proposal included splitting some decorations into different countries, but that proposal did not proceed.
The new leader of M&W, Natalie Trott, has mentioned the likelihood of a review of the military decorations, which will no doubt involve a lot of discussion within M&W as well as with other interested members. I can't pre-empt what that review might entail.
If segregating the Australian recipients of a decoration is important to you as a personal research tool, why not consider using personal categories, one for each decoration? That would work the same way for you, and wouldn't be affected by changes to the mainstream structure and categories. If you're not familiar with personal categories, I'm more than happy to help set them up for you.