I think that more categories = more confusion as to what goes into each. Things tend to blend together, and what seems clear to one person is not so clear to another.

I am happy with the present organization. I think that everything is clear enough, and if you have something that you are not sure of, "Around the Campfire" is the default catch all.

The other thing that concerns me is the moderators time. It is, after all, a non-paid volunteer job. It seems to me that many different categories would just make their job harder. (I don't think it is easy as it is.) It might even call for more moderators.

IMO, keep things as they are and don't be too upset if someone seems to have posted something in the wrong forum, or if a forum topic seems too broad.
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"Better is the enemy of good enough."