This belongs in the RNZN thread.FTI Medium-Size Frigates - Naval Technology
There are other frigates that can be considered this one might just might be controversial for New Zealand being French but appears more capable.
It's all about cost. Suffice to say that a cheap "frigate" already in service with the RN is going to look awfully tempting to NZ's politicians.
I hope that the low price tag of the Leander won't be seen as a political scoring point by the UK government, and therefore gets picked just so they can make a point about how much money they saved while still getting the hull numbers they want.
This is one of the reasons why I hate that the T26 and the T31 Leander both get the moniker frigate. It hides the enormous difference in capabilities between the two designs. The Leander should be called a light frigate or the T26 should be a destroyer. IMHO, of course.