What I tend to do is take a fandom I love and look for all the F/F in that fandom, regardless of which women are involved. I think that's where the system we have breaks down. (I actually thought the archive was broken the first time I looked at Avengers F/F, because only 3 works on the first page were actually about two or more women in the main role.)

Girls Kissing is now canonical, thanks for the catch! <3
(And yes, it's capitalized now. What happens is that the capitalization is set by the first person to use the tag, and it's not changed after that unless that tag is canonized.)

Unfortunately, Moresomes will be pulled out from Polyamory, because apparently it wasn't supposed to be subtagged. There was a pretty heated debate about one point about how these tags are used, and since Polyamory is a lifestyle as well as a shipping preference, we have to be extra careful. I'm looking into alternative umbrella terms now. If you have any suggestions, I'm all ears!