I just finished watching TAR Aus vs NZ, and I must say that I like the concept of having 2 nations, but it didn't turn out quite well in some parts due to irrational rivalry.
Anyway, TAR Aus 2 was great
and TAR Aus 3 was good enough!
I would want a 4th season of this with all-Australians or contestants from different parts of Australia & Oceania.
The editing was way better here than in recent TAR US versions.