Hi @Permakai - just checking on this link and it looks like NZ has already been changed to live
Is this where you were looking or is there somewhere else on the global site where NZ shows as under development?
Until the voucher functionality comes up the priority list there are a few workarounds you can use for tagging - one of my favourites is to create a promo email address and get shoppers to log in with this address to get a discount. You can then tag a payment method or shipping method to knock a percentage off their basket at checkout.
I have started a new post here to pick up on your idea of a library of marketing materials.