Alternate extinctions: For example, perhaps you could have the Tasmanian Tiger survive ITTL while the Tasmanian Devil becomes extinct?
Unification of the Colonies: Now this is probably going to be the most important part of your Australian update. Since your articles have so far been written in the form of an American textbook, they might want to make a special note of this. Let's say, that instead of just the mainland, and Tasmania, TTL's Australia also includes New Zealand, and some Pacific territories. Honestly, I would think an American textbook ITTL would want to explain why Australia managed to avoid becoming multiple nations (such as New Zealand, Tasmania, West Australia, etc.) in the way British North America did.
Of course, the above's my two cents. I'll be fine (and probably love) whatever you do.![]()
I love these two ideas quite a bit. The extinction of the Tasmanian tiger was a sad sad outcome of OTL. Cause they are awesome!
I also like the reversal of British North America not unifying into one dominion. But Australia, Tasmania and NZ all unifying into one you could also throw a few Pacific Island in there.