"cable" areas seem to get low priority for fibre
There isn't really any truth to this. The reality is cable covers the entire Kapiti, Hutt Valley (with the exception of the Western Hills) and Wellington suburbs right through to Johnsonville. Many of these areas already have fibre. A huge chunk of Petone, Lower Hutt and Upper Hutt already has UFB despite having cable.
The simple reality of UFB is that up until this year the focus has never been residential areas.
I'd leap from Vodafone cable to UFB but being in a residential area with no schools or commercial buildings we might be one of the last to get UFB.