So far I haven't noticed anything that ages it worse than other genre shows of that era. That's not to say there is nothing - it's kind of Whedon-y in a lot of ways, including strong "feminist" depictions of women clearly just being a fetish. Though honestly, the show is so horny I'm not sure they're trying to pretend it is anything else.

Ah damn, if I had waited two episodes before posting I'd have something to add. We've got some uncomfortable jokes about gender presentation and a very mild gay joke.

I don't think it's particularly egregious, especially given what was typical at this time, but we're presented with a character that is assumed to be a man as she looks just like a human male. There is a joke earlier on where the character undresses and the crew jokes about a certain lack down stairs.

At the end of the episode it's revealed that this is actually what women of her species look like and she professes her love for a male member of the crew, which is played as a joke. Another crew member who witnesses this then shortly after jokingly asks while flirting with a woman if she is really a female of her species. He is relieved when she says she is.