Absolutely want more queer characters of all varieties in game! And yeah, the lack of gay couples with kids is pretty jarring considering all three lesbian couples have them (although I do like that Knox and his Mums are older and that he's explicitly adopted, which is something you don't see much in games).
And definitely more explicitly trans characters, too. Characters like Darling, Lia, and Paka'a can certainly be interpreted as trans (and I do!), but setting-wise, all of Darling's are congruent with being selected as female (including a feminine dress sense!), and the only custom choices on Lia and Paka'a are a masculine frame and a feminine frame, respectively. Lia has a feminine dress preference, sits down, and can get pregnant, Paka'a has a masculine frame, stands up, and can get others pregnant. At the moment, Morgyn is the only one whose settings suggest they're trans (either a trans man who prefers fem fashion, or nonbinary, the latter of which I go with), and I'd really love to see more, including with families (also neutral pronouns, please Maxis I am begging you).
And yeah, definitely more queer couples, and more variety with them. It's frustrating having to actively change settings just to see Sims like you.