I don't really understand land releases, surely this could happen faster, it feels like its geared towards maximum profit to only release in small chunks when there are large areas they will eventually be subdividing.

Somewhere like Melbourne though, I think things need to become a little less inner city focused. As in new suburbs are popping up but not a lot of employment is close to them meaning that transportation becomes worse as there are ever increasing numbers of people making long trips to work from the outer suburbs. I've always thought it would make sense to stick another inner city like hub somewhere and put high speed rail or something between them, rather than forever branching out from a central hub.