You know, now that you've done all of the really laborious production stuff like the roto and building out all of the imagery, and you have your first pass done, I think you could and maybe should do a second cut. Do a cut where you look at the footage that's available to you and use that to craft an exceptional story, or a very specific mood, or both.
The edit that you have now is kind of lacking in terms of pacing and arc. Every cut feels like it's about as long as every other cut. And that makes every shot seem just as important or unimportant as every other. So what you have now is a ton of work that you're showcasing in what amounts to a slideshow. If you go back and figure out what imagery is worth lingering on, and what imagery is going to prove more powerful in rapid succession, you'll have used all of it in a much more meaningful way. And that's really just for starters. You can certainly make better use of the visual interactions between cuts, the implications one image has on the next, the way the cuts complement moments in the audio, etc.
This is really one of those cases where you've already done the gruntwork, and have one in the can, and it can only get better.