Yes, as mentioned, we’re planing to make a change enforcing only one global status per taxon. This thread is really just about global statuses. Things definitely get more complicated thinking regional statuses.
Any curator can make conservation statuses (global or otherwise), we we can’t really control what regional statuses are being made. Where we have network nodes there is a process for these networks to batch update/create/destroy all statuses within their nation annually. We’re working with nodes to figure out ways to make these plans clearly laid out to the community.
In the US we don’t have a network node, so - like IUCN global statuses - we the iNat staff have been in conversations with NatureServe about whether/how we should take on batch-maintaining NatureServe statuses in the US. We’ve been piloting that with Reptiles and Amphibians as you can read here:
https://forum.inaturalist.org/t/natureserve-conservation-status-pilot-united-states-amphibians-and-reptiles/25901 your questions such whether it would be beneficial to have NS statuses loaded up in iNat or not, are definitely on the table for discussion and great to hear feedback from community members if you want to comment on that thread