It's normal for it to open up a lot more at T-80 (80 hours before departure). It may open up even more once upgrades are processed and as it gets closer to T-24.I am booked MEL-CNS on Saturday. Definitely expect to be cancelling today or tomorrow. The seatmap has freed up dramatically overnight too...not sure how normal that is (on QF, no status) at this stage before departure.
It appears that Vic is going to wait and see with existing restrictions today. As to whether other states see the need to put further restrictions on travel from Victoria today remains to be seen.