Exactly DA!
Put any kind of competition on the route and watch the punters go for the quality product!
Mind you if someone else did fly the route QF would probably pull the pin like they have for years leaving the market for others to cash in on.
Customers will love coming all the way from Europe then switch to a JQ A320 to Cairns via Darwin. That will keep them coming back!
Someone in QF must try thinking about something novel like product positioning!