That would be the ideal solution (particularly for the longer term) ... but my point being, we may need something interim to fill a potential capability gap shortfall. Even if it were eg another Sikorsky S-70 or H-60 second hand or refurbished product in order to learn how to operate it.
Not sure NZ would get brand new MH-60R's fast-tracked off the production line in time eg if the USN were willing to give some slots up (for Australia, likely. For NZ, not so sure).
Yes, but one needs to remember that it takes time to get any order, even and interim one, delivered. First, the decision on what to get needs to be made alongside how many, much to pay, etc. Then the order gets placed with delivery to follow
nn months or years later, with air and ground crews then getting stood up and trained so that the capability can see service once it is delivered.
All of this needs to happen for interim and permanent/long-term solutions. The only possible advantages I see in any 'interim' purchase is that, depending on production slots and order books, initial deliveries might be able to take place before a specific piece of kit to use long-term might be deliverable. The other possibly advantage is than an interim piece of kit, particularly if it has a minimal fitout, might cost less.
Some of the downsides are than an interim piece of kit, particularly if it is costly and/or brand new, might become a permanent replacement even if it is not particularly useful or appropriate for the desired role.
IMO a major advantage of the MH-60R 'Romeo' Seahawk is that in addition to being an advanced and effective piece of kit, has a fairly wide user base in the Pacific. Both the USN and RAN operate the MH-60R, with other versions of the Seahawk family operating in the Pacific by the USCG, Japan, Thailand, Taiwan, Singapore and S. Korea.
Something else to consider is what & how any future Kiwi naval helicopter would be armed and kitted out, especially if the helicopter is to be an 'interim' selection. This could become a bit of a problem if something like the AW159 was selected as an interim piece of kit, since the weapons fitout is largely different from anything else in service in the Pacific, apart from a few units in S. Korean service, though those units also are fitted with domestic S. Korean ordnance as well.