Initially yes purely out of defensive registration (fear & greed) until the opportunity cost kicks.
Realistically, the top end of town who holds the most valuable names will be possibly locked into a yearly fee escrow scheme until settled. So that leaves marginally valued domains in the registration pool.
Accordingly, the propose rules (if accepted) won't allow the transfer of .au rights to investors wanting to buy a conflicted com.au because both buyer and seller forfeit the application rights to get .au when a change of registrant occurs.
So no, I doubt investors will be actually buying the .au under these policy rules.