Manabi
All of them hold up pretty well when binging them, although I do fairly slow binges, maybe watching 3 - 4 episodes a day at most. There are episodes I dislike and I simply skip those when binging, which helps a lot. (For example DS9 is my favorite Trek but I really, really hate Vedik/Kai Wynn and skip the earlier episodes where she’s being an annoying bitch. I do watch the later episodes where she’s a lot more important, but I still hate her character so much. For TNG I skip all of season 1 and most of season 2.)
Yeah someone being non-binary or whatever and no one caring or commenting on it at all is a lot more progressive and meaningful. TOS did that really well with Uhura on the bridge. She was a black woman and absolutely no one on the ship acted like that was remotely odd. It sent a very powerful message.
And on the extreme end of that was the Duras family being more like the stereotypical Romulan (and even allying with them against their own people) than a Real Klingon™. It was disgusting how they managed to keep their house throughout the series, even though they were everything a Klingon wasn’t supposed to be.
A big part of Voyager’s problem was that the writers had absolutely no clue what to do with Kes. You had one of the main characters being just kind of there and largely useless. Once they brought Seven of Nine in and dropped Kes Voyager got a lot better. The writers had a clear understanding of how to write for Seven and she had a ton of character development over the final four seasons. Hell, I’d even say they did a better job with Neelix once they got rid of Kes, since they couldn’t keep falling back on “Neelix is super jealous of Kes interacting with any male on the crew” BS they did a lot of. (And dear god was that annoying as hell. And I like Voyager!)