Why CEAFAR?
If it were to replace the Thales radar, that would partly be because:
- proper AESA radars like CEFAR (by which I mean, not a rotating AESA face) are able to provide a detection capability which is a generation ahead of the mechanically scanning types; and,
- because it is a local item with the benefits of logistics, commonality, software/hardware growth, and economy.
If these discussed boats were to have ESSM etc then logic would dictate that you might want to give then a literal fighting advantage rather than accept 'quite good'. Just because RNZN ends up with good enough for the last decade, doesn't mean that is a good strategy for winning kinetic engagements with the PLAN.