Interesting article in the Herald today here.
Having just done this, I have to say it was harder than the recent international flights I took. Some key issues for me worth the attention of those looking to speed things up were
- Departure cards. WTF is the point of them? Just a hassle with no useful purpose in this day and age, as well as a massive waste of paper
- Australian Smartgates. NZ ones have a single part - you put in the passport, get the biometric check and you're done. The Australian ones have two bits. Put in passport. Get a ticket. Walk miles to the next bit. Put in the ticket. etc.