Australia will have the 9lv in the 3 awds, 8 anzacs + 2 nz , 9 hunters (of a continuous build program), 12 OPV's (of a continuous build program), 2 x LHD's, 2 x AOR and Sweden, in the 5 x Visby's. Which by my count puts it on over 40 ships. More importantly those 40 ships are basically in the region in and around NZ. I worry less about supporting cms from a point location as I do about taskforce integration, training and operations. Australia is likely to lead any operation, while, lets say I doubt CMS330 ships will be leading in our region.
AFAIK there isn't a huge world of difference between the CMS330 and the 9lv, and from my understanding the CMS330 even uses elements of the 9lv such as the CanACCS-9LV workstations (at least on the upgraded Halifax).
It isn't so much the value of one of against the other as in the break down of the original ANZAC goal, a common class of ships, where training, upgrades, weapons, support, logistics, etc and easily cross supported. Where one ship could fire from a common warstock and operations could be supported by Australia's massive territory and regional power both soft and hard.
There are other flow on effects as well. As Australia starts divesting itself of the Anzacs, NZ could have as many ASMD ships as she wanted. As NZ get rid of hers sometime in the next decade, they could then operate together with other ships of its class for some other nation.
The whole ANZAC concept came about because of souring defence relations NZ had with the US (and other nations). I don't know the current vibe in NZ, (or Canada) but here, I would say Australia seems to have serious concerns regarding the future stability and level of participation in by key members in the current status quo. Australia isn't tripling the displacement of its fleet out of compensation due to Rugby losses, or rampant nationalism.
I can understand the want and need to look at perhaps a different platform, but one that shares the key elements, systems, weapons. We seem to have gone the other way, a common platform, but one that no longer shares elements, systems and weapons.
In a war scenario I would hate to see big problems arise due to square pegs and round hole type of issues.