A problem with extending the acronym to specifically include more edge cases is that it makes the omissions more obvious. Another is that having a bunch of syllables is clunky in speech. “Queer” is pretty inclusive, though many are still uncomfortable with the term as it has been used as a slur. I’ve always been fond of SAGA (Sexuality and Gendered Acceptance) because it covers everything, is memorable and meaningful, and has no baggage. And using preferred labels when they are known, also a fan of that.