I think I've said this couple of times before here too, but Sunset, Southwest, Brother, Far Better Thing & Refugee. They're all...amazing. I can't actually see Sunset being really different than the other songs. It's like some sort of combination of Autumn, Vagabonds and Better Than Them. If I had to think about what it might lack - it might be MORE loud acoustic guitars and singalong backing vocals -> a bit more 'folky' thing.
And the deep-hearted moment: I think also that if/and when music seems to "lack" something, it means it's already perfect in the state it is. It gives emotions and inspiration about something. Somebody said: "art is perfect about being never perfect"...
