Valid concerns chaps but lets look at some context. It appears to be an economic investment agreement from what little info has filtered through at this point (and apparently not
security related, in fact Australia are signing a
maritime security agreement with the Cook Is. to strengthen transnational crime co-operation, plus constitutionally wise the Cook's cannot enter into agreements on security and defence without NZ's agreement).
The issue seems to be the Cook Is. Prime Minister conducting these talks (and signing) in secrecy. This has cause an uproar for the
local population and expect to see push back from them (he seems to have form and has now backed down from pressure from NZ over his recent
passport issuing idea).
Suspect the secrecy is due (in part) to what some of the economic investment plans will involve and their scope (I'm guessing it will be larger than what the local population, other Pacific Forum nations and environmental groups will be comfortable with)? I think mention has been made of deep water resource extraction (and fishing) and I can only surmise China will no doubt in their usual way disregard "international" environmental safeguards and contaminate/pollute a much wider area than necessary (saw an article somewhere recently talking about environmental destruction being caused in the Solomon Is. caused by Chinese resource extraction efforts).
I'm not trying to downplay things as in essence this is yet more great power play competition in action with the CCP playing the long game. And whilst on the one hand I can see the Cook Is. PM wanting greater economic investment (from what NZ, Australia, US, Japan, EU etc can offer), I think he may be under estimating the balancing act he will need to maintain as the CCP will want and demand more and more.
In terms of "allied" response I think there may be some Pacific Island concerns over the new US Administration walking back on development and aid for "climate change" initiatives (so perhaps then, ironically, one of the world's greatest polluters (CCP) will then try and splash the cash even more to gain further influence)? The Mandarins in Wellington and Canberra will be busy earning their keep and trying to ensure the US remain engaged.
As an aside I flicked around some of the local media/foreign policy commentators on these issues to see (what little) they are saying so far over the last couple of days and in a couple of cases noticed their disdain for NZ's centre-right Govt and in particular Foreign Minister Peters sees them blaming him. Nope, the CCP have been active for years and presumably this issue had its origins under their favorite previous Govt (as agreements don't happen overnight) ... so please beware of biases in some instances.
In the meantime perhaps the NZG should seriously consider spending some $$ and forward basing one of the OPV's at Raratonga to keep an eye on things going on at sea (and the Cook Is. have been calling for a better NZ defence presence anyway). I'm sure it will help with recruiting, who wouldn't want to spend time in the tropics especially over winter! If so perhaps the UK model for the
River-class batch 2's could be considered? That is, FIFO crews, meaning a small port side presence?