I've only just started working Perth arrivals and there's certainly not 10nm between deps to enroute (and neither should there be). Pretty sure flow gets the ADSB feed these days, too. Could be wrong.
I also heard that one of the big mining bosses offered to bring his earth moving equipment into Perth from one of his sites and build a new runway at his cost, in a matter of weeks. Airport owners decided a DFO was better.
