>>12742177Alot of people embrace the dupe clause, and it can be used to have a diverse run and play a Nuzlocke how it's intended to be played; being forced to try new Pokemon out. So I'd say nuzgen's outlook on it is pretty positive.
Personally, I don't use it for alot of my runs It's fine to use as long as it's not abused to make the game easier, like mapping things out to get a powerful mon to make the game way too easy.