I think most of the makers and fans of Trek describe the shows as optimistic, idealistic or reformist rather than progressive in the sense of advancing a concrete ideology, with TNG the one most accused of being overly pushy for left ideology.
I thought "The Outcast" was a good episode, both blatant/preachy and yet safe (although not that much more, if at all, than the Kirk/Uhura kiss being mind-controlled) but I don't mind a social message being somewhat blatant and I thought both the romance and later the outrage against the repression were well-developed.
There was a comment by Sisko in "Dax" that Curzon was interested in women and Jadzia was different, insinuating that she wasn't and couldn't be because she was a woman, that's insensitive (especially in today's context) but pretty mildly so.
I thought "The Outcast" was a good episode, both blatant/preachy and yet safe (although not that much more, if at all, than the Kirk/Uhura kiss being mind-controlled) but I don't mind a social message being somewhat blatant and I thought both the romance and later the outrage against the repression were well-developed.
And it's not like they ever displayed openly anti-gay behavior on the show either, not even on TOS.
There was a comment by Sisko in "Dax" that Curzon was interested in women and Jadzia was different, insinuating that she wasn't and couldn't be because she was a woman, that's insensitive (especially in today's context) but pretty mildly so.