And Kes was potentially a fantastic character, but the writers rarely made use of the possibilities. I'll grant that it was a missed opportunity, but I disagree completely that she was "hardly... interesting."
I thought she was really boring right up until a few episodes before they got rid of her, they finally started developing her character than BOOM , suddenly she's gone.
They way they brought her back was horrible, I wish they'd left that alone.
I agree Warlord was a great episode for her character though, I think she was better operating as a separate character rather than a Neelix accessory.
The only really dull as dishwater character was Chuckles, but again, they could have done far more with him than they did, in the episode Learning Curve we saw him be very unorthadox with the crew in his discipline ha I would have liked to have seen more of that side, not punching them every time obviously though.
One of the things that makes "Emissary" special as a pilot is that it actually tells a complete story, rather than just being the beginning of one. Most pilots just set up a situation and leave it open-ended. "Emissary" did that to a degree, sure. But its core story was a drama about Ben Sisko coming to terms with the death of his wife and starting to move forward with his life again. So what was just a setup from a plot standpoint was a resolution from a character standpoint. And it's not just a resolution, it's a major transformative event in its protagonist's life, as the resolution of a movie or novel would ideally be. And that's good writing. Even a story that's part of a larger series should be able to stand on its own as a complete narrative work -- something that's increasingly forgotten in our serial-obsessed times. And "Emissary" has more completeness and closure than most pilots.
It's also a classic Star Trek story, a tale of first contact and mutual discovery between wildly different life forms, giving its protagonist the opportunity to philosophize about the human condition. And Piller conveys this in a very atypical, almost poetic way through Sisko's extended baseball metaphor, so it isn't as heavyhanded as such things often are in Trek. That scene has always been one of my favorites.
It was only re-watching Emmisary that I really got how good it was, years later, the double meaning of the first contact v the prophets helping Sisko with his own personal issue through their own lack of understanding, encountering a species that far from being human clones with a dot on their head like nearly every TNG species, didn't even understand linear time.
Its one of the many examples from DS9 that destroy the oversimplification that "DS9 destroyed the trek vision", it didn't, it did plenty of exploration, even TNG style "how we've moved on" stories like "Past Tense" and at the same time it went further by exploring what happens when those ideals are tested under threat of total annihilation.