These types of conversations about broader taxonomic issues would be better held on the forum, where anyone can ask a question or start a conversation. In fact that’s already happening, such as with the Clements 2019 discussion.
Right now interested participants—who are not project curators—must use the comments section of an existing journal post in the working group, which is an unnatural way to have a discussion since the journal post might be about a completely different topic. (I also left most of them because I don’t want the little badge displaying on all of my observations—the working group doesn’t really relate to my observation of a particular species at that time and place.)
I don’t think each working group should be relegated to a single topic, and conversely splitting each working group into its own category seems like overkill. I think the various discussions can be hosted in taxon flags when relevant, and the broader discussion topics categories here like #curators, #general, and #feature-requests. Having a coherent place to hold these conversations would be one of many little things that would help improve taxonomic curation on iNat.