Have you been notified of any changes? I am also in NZ and haven't heard anything.
@AJCM says "They’ve also increased the excess from $350 to $500" We in NZ must be on a different set of conditions, or completely behind the 8 ball. My excess has always been $200.
Also, a little known fact - if you are going to incur a fee for paying by credit card, (Princess charge 1.1%) they allow you to pay by debit card, or internet banking, as long as the accounts are also held with ANZ.