I found a relatively minor issue with art depicting mature_women. Anime-styled art typically values (relatively) simple facial detailing and one of the few ways that artists can portray a character's age is by drawing wrinkles, or not-quite-Crow's Feet below the eyes that artists draw to make women look older. I'm currently tagging works featuring mature_female characters with these features (and mature_males will likely be included in the future as well) under "mature_eyes". (For examples, please review the currently tagged works).
I wanted to clarify and confirm what I am doing here with the hopes of preventing any future confusion and/or unprompted deletion of the tag. If an alternative name for the tag other than "mature_eyes" is needed, that is fine and I do not mind the tag being renamed.