Given that both the NZ & Aus govts, plus various state govts, plus various health authorities will all need to be consulted, I think any definite decision on where/how 2020/2021 A League will unfold, is months away.
Even more so, when you see how quickly a new outbreak can unfold, and then new travel restrictions rapidly be enforced.
However to be fair to the Nix's players, esp visa players with families - they probably need soon, to look at the likelihood of another Aussie hub and what that means for them. No-one's really playing well at the moment, but the form slide of Ball and Davila away from families seems esp noticeable. They maybe struggling a bit for motivation at the moment, one foot already on the plane, and really you couldn't blame them.