It seems a consensus is reached to:
Implement Sandbox2 without CI/Niue - e.g. changes to status quo: adding new (3rd) section (UN members) and sectional sorting criteria improvement, A-Z sortability (allowing for inclusion criteria/neutrality non-default view), adding coloring and coloring sorting criteria
putting a temporary footnote after the "Vienna formula" link in the sorting criteria section with something like "Besides the listed 194 entities member states of some Vienna formula organizations are also the Cook Islands and Niue, currently listed in the New Zealand entry." - and then, inside the NZ entry, to add to the CI/Niue notes the list of organizations that they are members of such as "Cook Islands, member of FAO, etc."
continue discussion of proposals for CI/Niue coloring and try to resolve it within a week.