The measat3a satellite was moved to the 160E position a few months ago, its in use already and most of the Australian traffic has moved over to it. However the footprint from it isn't really ideal for NZ only converage as the fixed ku band beams were designed to cover Indonesia or Malaysia.
http://www.measat.com/wp-content/uploads/2018/07/M3a_temp.pdf
If they manage to configure usage for Sky NZ there are other issues. For starters the LNBF skew is way out compared to Optus so would still require a tech visit to adjust it.
Optus D3 at 156E was always supppose to be the backup for SKY NZ hence many installs of those twin head lnbfs.
Then of course there are all those Freeview installs as well. Perhaps 2024 we will finally see a deal with Freeview for Sky to turn off encryptions on 1,2,3 ETC..