Those lists are interesting, so thanks for compiling them.
JNC could try to categorise novels into genres, although some though choices would need to be made. For example, lndb lists FMP under the following genres: Action, Comedy, Mecha, Romance, School Life, Science Fiction. Which of these would you categorise it under, or would it be listed under all of those genres?
What might be better is for the site to have quick links to the top 10-20 tags which correlate to popular genres and areas of interest and ensure each series is listed under at least one popular tag. Or people could have checkboxes next to each popular tag and it'd list all novels that have one or more chosen tag. Either way the principle is to make it easier for people to find what they are interested in without assuming that a novel is only in one genre.