1. Issue confirmed LHR-HKG and continue to waitlist HKG-AKL -> I think yes?
2. Add HKG-AKL if it confirms -> yes but it's a reissue (fees 10K AM/100USD) -> the ticket needs to be totally unused i.e. cannot after first sector flown
3. Issue confirmed LHR-HKG and random date HKG-AKL:
a. change time within same cabin (PEY for PEY, J for J): yes, is rebooking (fees 1K AM/25USD online / 4K AM/40USD else incl. if you cannot do it online for any reason), can fly first sector
b. change time and cabin (e.g. PEY to J): it's also a reissue (fees 10K AM/US100) -> the ticket needs to be totally unused i.e. cannot after first sector flown
4. Award tickets cannot be further upgraded without reissue
5. Mixed class LHR-HKG F + HKG-AKL J should require about 106K AM for standard reward per new mixed class calculation method