I would also love to see Themes (such as as we see School, Workplace, etc) added to StoryGraph for this same reason. Probably not as in depth as many manga sites do them, I do believe it would start getting a bit too many, but a lot of manga can only just get "Fiction - Manga" as tags because they just don't fit anything else enough to get the registered genres. If not adding new genres, I'd love to see a theme feature (eg on Music sites they have Pop Music - theme: J-Pop, Progressive Pop, K-Pop, etc). I feel this would also work for a lot of romances and co outside of manga where people want specific themes such as Workplace romance and co