I suspect HLZ's timings for PB were chosen as they give outbound travellers good connections in AU to other destinations incl Bali/Puket and good timings for the business traveller. The timings will not suit operations as there will be issues with fog vs lunchtime flights but these would have been a poor choice commercially. The fog will be a major though.
I think you are all forgeting, PB are not going to HN for a destination market, rather providing outbound service for business and NZ tourists.
RO is inbound for AU tourists and will take some of the pax from PB's HN ops but how many - not sure?