I don't think it was mentioned in the article (I just skimmed) but Mawson's city plans of 1913 would've changed the city completely. Hard to say if for better or worse, but it certainly would've been a completely different city.
This would've been 4th St and Centre SW:
Ultimately, the plan was shot down due to being incredibly expensive. It would've cost $10 million in 1913 money.