I don't think so. The CEO of YNZ has publicly expressed their support for the decision and, like the US, cites a rationale that is plainly outside the criteria specified in ISAF regulations.

http://www.nzherald.co.nz/section/4/story.cfm?c_id=4&objectid=10475891

Also, as far as I know, the AUS and NZL delegates are not explicitly expected to represent the views of other nations in Group L.