Jetstars loads are certainly down (not helped when they swap & change the schedule around every month and drop flights) But then
VB's loads are down a bit to, lots of 700's coming in lately.
I also heard a rumour that QF is looking at going back to OOL ex SYD and MEL, and also LST ex SYD and MEL.
I would be very surprised if QF mainline were to come back here, the LST - MEL route seems to be serviced reasonably well by the Dash 8.