That's a good concept, to add categories like Closet Hentai for characters who has more than 7 points of lewdness and less then 5 points of boldness. But, there are three cases which made the choice kinda perplexed:
1-establishing the terms for the categories might be difficult.
2 -Most of the boldness and lewdness rates aren't fixed, like Classic Tsundere for an example; initially cold and even hostile towards another person before gradually showing their warm side over time. This change of behavior is permanent, and that's where the classic tsundere type is different form the modern tsundere.
3-I think that we already have enough categories, plus to add more would make the characters usual, and i prefer them unique, that even if they the same category they have their singularity in their way to emit and show love.