Todjaeger
Potstirrer
The LHD being overkill, or not, really depends on the event in question, and what the ADF/Gov't wants brought in.When the Camberra and the Adelaide arrive and start working the Force projection capabilities of the RAN will be very good.
But, for something like Tonga, Fiji or other micronesia states sending an LHD is overkill
Something like a Bay class, a Roterdamm/Galicia Class or a Foudre or similar LPD, with ro/ro capabilities, capable of transporting 3-5 medium or 1-2 heavy Helicopters would be much more appropiate (IMO)
If there was a tropical cyclone, earthquake, eruption or tsunami, depending on circumstances, only a little aid might be required, or potentially a great deal. Same also applies if troops need to be landed and deployed. Only a 'few' might be needed, OTOH a great might also be necessary.
While it would be nice for the RAN to have some options to provide flexibility, I would rather that the RAN/ADF deploy and asset which can provide more capability than required to an event, than one which provides too little. While the potential for dual ADF/NZDF use of HMNZS Canterbury could provide some sealift coverage while the RAN gets the fatship issues 'sorted', if something occurs which requires more than an enlarged company group to be landed by ship, there will be problems.
-Cheers