You bought me in the first 15 seconds or so. Really does feel like a ~2002 revamped progressive trance sound at the beginning.
That said, I agree with the bassline comments. I wouldn't even go for something with groove - I think even a simple, muted Coldharbour-sidechained bassline would work wonders, with less aggressive hihats if you wanted to make it seem even slower.
In addition, those melodies are pretty good - however I don't think they work quite well. They kinda work in tandem with the bassline and cymbals, however not quite with the atmospherics. And I think the atmospheres are so good that they deserve to be more prominent, maybe even kind of a centerpiece of the track. Stylistically, this gets a bit all over the place as the track goes on.
I can't wait to hear what you got next though! I'm quite encouraged by this.