Subconscious regional bias on my part, I guess. In the brown country (which is basically that world's equivalent of OTL's Australia), I have the equivalents of a shrunken New South Wales, a drastically shrunken Queensland, an extremely shrunken South Australia, and an uber-Victoria.
But I guess you could consider the green country a huge Queensland... a huge
northern Queensland anyway. The idea is that the green country didn't form as a federation of states - it was a unitary nation that was
divided into provinces.
I'd like to see an update of your TL, it's quite intriguing... but I can't really see how you'd incorporate any of my map into it, as your POD is after the straight-line borders were already established. (Oh, I guess if Victoria were to annex SA territory southeast of the Murray River you could use that border...)