Fifth freedom routes are not that easy for foreign airlines to make money on. See the previously linked article ...Correct me if I’m wrong but wasn’t it KUL-OOL-AKL before they had the Sydney stop.
Flying AKL-SYD earlier this year on Air Asia it was about 70% full but 99% of that was down the back with only two in the flatbeds and a handful in the quiet zone.
That being said almost everyone onboard was just flying AKL-SYD with very few actually continuing to KUL, perhaps they’ve realised slots/airport fees etc are better from the Gold Coast or total tin foil hat they’re now getting a QLD or QAL subsidy. Air Asia is now the only wide body operator to the Gold Coast and those terminal expansions that QAL did are looking a little silly now.