Hello! Thanks for your post. As the Mod leading the Recat team, I wanted to respond with some thoughts.
As a librarian, I do understand your reasoning, however we feel that the current hierarchy is the best and easiest for both the users and the Moderators. Multiple sub-genres would become too unwieldy to maintain. Believe it or not, we actually get complaints from users who don't like the current structure and want ALL eBooks in ONE forum! If we were to have sub-forums under the SciFi/Fantasy/Horror we'd be looking at at least:
Alternate History
Arthurian Fantasy
Bangsian Fantasy
Biopunk
Child in Peril
Comic Horror
Creepy Kids
Cyberpunk
Dark Fantasy
Dark Mystery/Noir
Dystopian
Erotic Vampire:
Fabulist
Game-Related Fantasy
Gothic
Hard Science Fiction
Hauntings
Heroic Fantasy
High/Epic Fantasy
Historical
Magical Realism
Military SF
Mundane SF
Mystery SF
Mythic Fiction
New Age
Post-Apocalyptic
Psychological
Quiet Horror
Religious
Science Fantasy
Science-Fiction Horror
Social SF
Soft SF
Space Opera
Splatter
Spy-Fi
Steampunk
Superheroes
Supernatural Menace
Sword and Sorcery
Technology
Thriller SF
Time-Travel
Urban Fantasy
Vampire
Weird Tales
Wuxia
ZombieWhich, as I hope you can see, if just far too involved and complicated.
In a general way, we have modelled our genre forums on library standards. Zombie/Post Apocalyptic/Dystopian etc novels fall under the genre of Sci-Fi/Fantasy/Horror, all of which are sections you will find (I hope) in your local library. It's rare that there will be sub-divisions within those sections, at least in the libraries I have visited and worked in. The same principle applies here as it does there really: you browse the "parent" genre section looking for titles or authors that you know or you think might sound like a good read in its sub genres.
So, yes, the ratio of books in one category might outweigh another but there is not much we can do about that. Don't forget we also have a
Reading Recommendations & Discussions forum that can provide you with suggestions for new authors etc.
Thanks for your feedback though, we always welcome and are glad to hear from people.