Gotta love a media beat up
Biggest media beat up for a while!! The proximity of BK to SY means a major restructure of the airspace would be required. Flight training and GA obviously would end up moved to CN and WOL (not a bad thing!)
The only real sollution to a second airport (without building a completely new airport) is Goulburn with a high speed rail link to Sydney. In this day and age the military bases are becoming busier and Williamtown will never expand the RPT apron or allow more movements (NB: no longer an international alternate)