I agree. Although it's only my first story on Steemit, I've been posting the 'Galdor and the Four Swords' series with the primary tag fantasy. When I post scifi, I'll use that as the primary tag. Fiction can be quite a mix and has a TON of content; subgenre tags gives better organization.

It would be nice if Steemit ever organized tags to allow parents. Example: a reader could browse the fiction tag and be able to see a list of the different subgenres of fiction posted on Steemit. It would lead to more discovery of tags someone might not have known they would be interested in, therefore not initially seeking it out. I'm sure many people haven't heard of mythpunk, but if they saw it listed as a category under fiction, I bet a lot of people would check it out!