Defintley wont do any good out of AKL, WLG or CHC going there would be pointless and most have the 2 LCC's and the many premium carriers.
With Wellington, for flights to Melbourne and Sydney at the present there is only QF and NZ on the routes, and for Gold Coast only SJ about to become NZ (no direct competition).
For Brisbane there are three players but QF is low frequency and DJ only three times a week. NZ 5 or so times depending on season.
Hence there is not that much LCC competition ex -Wgn on most routes.
On the largely leisure routes to OOL and Brisbane ex Wgn only 3 flights are week are with planes with an LCC seating configuration. Many people still go via Auckland.
But who knows which routes DJ will add next ex NZ?