Right now there is no freight above werris creek and only a daily 4 car DMU service in the busy times. If you took baby steps of reintroducing freight to tamworth, and maybe an extra 1 or 2 services a day to either Tamworth or Armidale then maybe people could take a reopening proposal seriously.
I would like to see a daily service to tenterfield with a bus connection to toowoomba and a bus connection to brisbane. I reckon you could a fill the 2 buses everyday as you aren't dealing with small country towns. But this alone wouldn't justify having to rebuild around 200km of railway.