Don't worry about the Appeal, page-18

You forgot a few legal options.

3.) They can lodge a claim through another channel which is separate but functionally over-laps the same jurisdiction as the high court (i.e. mining approvals board, land claims, fair investment association). This is similar to what happened to Lynas in malaysia last year, they won through the court then got 2 more claims launched, one from the environmental protection agency and one from the judicial appeals court (both separate to the court which handed the decision).

4.) they can launch a new claim based on the same evidence for a lesser extent under the fair retribution law.

I think 4 is unlikely because the court can decide on the spot for a joint win (i.e. both parties get 'some' of what they want but not all, i.e. forced settlement).

3 is probably the route they would go, if they decided the legal fees were worth it. It would, if approved, delay any damages payments and working of the site. Fairly unlikely to be approved.