With the absence of FIBA competition over the last 12 months, just following the progress of Kiwi players.
generally in terms of offensive or overall talent NZ is not a top 25 nation in the world (that's safe to say) .
However in terms of defensive players and the possibility of preparing team defense I honestly think New Zealand is a top 8 world defensive team.
Note that Australia is one of the best ( top 3 easily) defensive teams in the world , the Kiwi players playing in the Australian league ( NBL where defensive is played ) are known for their defense : Notably : Shea Ili ( many consider best defensive NBL PG) , Izayah LeAfa (starts for SEM and is their guard import defender) , Te- Rangi ( a top NBL wing defender) , Ngatai ( considered one of Cairns top wing defenders) , Abercrombie is NBL defensive player of the year , Harrison ( Brisbane's best center and defensive center) , Wetzell ( leads NBL bigs in steals and one of the best PNR defenders) . Put those 7 players around Tai Webster and Fotu ( who are good defenders as well) and you can see why the Tall Blacks potentially are a top 8 World defensive team.
Let's not talk about Adams ( who leads NBA in offensive rebounds, screen to pts etc) ,
NZ has always been known to prepare well for World tournaments, mainly because of it's relative access to it's core players being available to prepare for longer periods of time.
I think defense is the key to elevate a less talented team in the World's .. it is what can elevate a B level or second tier talented teams to top 10 .