in the interest of fairness NZ commands were protected in the same way VAA commands were protected for the most junior F/O's.
Not correct, if anything VANZ fo's have more protection - VAA fo's have no protection over VAI pilots (except cruisers).
If VANZ got A330's (highly unlikely I think, although some in VANZ seem to think its going to happen even though JB has said they have no plans to do this) than I don't see why the VANZ senior pilots should not have priority to operate these.
The protections only cover 737 or similar, not WB.
But of course when Virgin Pacific starts none of this will matter...