One problem that I'm having while searching from manga is that if you are searching by the tag "Romance" you get manga like Komi-san, but also Rise of the Shield Hero. I love both of these, but Rise of the Shield Hero does not have as much of a focus on romance as Komi-San. So, I think having some sort of "level" system for tags. For example, you could choose a few tags to be the "main" tags, and the rest aren't normal. You could search for only "main" tags, both, or normal. I don't know if this is a big enough problem for the amount of work I assume it would take, but I think it would be a nice feature to have. For an example, I'm thinking something similar to tags on Anilist, but I don't know whether or not users should vote on them, or if scantalation groups would do it.