Thrice weekly seems pretty half-assed, but I suppose it fits with Air New Zealand's half-assed approach to running an airline. Launching after school and public holidays too, which is odd.
I suppose the Fri-Mon return allows a long weekend in AKL, but are there going to be many takers from that catchment?
Barely 20 bucks cheaper outbound, a few pennies cheaper inbound compared to NZ's SYD flights, and not significantly cheaper than QF return for the same dates in the inaugural week... so, why bother?
I don't think AKL is a huge market for Western Sydney, but it's surprising the cheapskates couldn't even be bothered to launch the route with special fares to get some attention and boost early loads.