I’ve never had a vanity kit on a Trans Tasman flight in business on any airline. Too short a route for them to bother.
I’m also not a huge fan of the Air NZ herringbone ‘Business Premier’ seats. Certainly they are a million times better than sitting in Economy, but compared to my relatively limited experience with other airline’s lie flat hard product (being UA domestic first on a B757 and a few domestic QF business suites on the A330), the Air NZ seat has been my least favorite.
I’ve only flown Air NZ business on the B733 (3 or 4 times now), but I think the seats are slightly narrower on the Dreamliners, if that’s what you were on?