Some other criticism, then.
Yes, the singing ... is quite sloppy (inconsistent and "careless*," really) and needs work. If it's just a rough cut to get something in your ears, then it serves its purpose. If it is intended to be anything close to a production version, well, it needs a lot of cutting and polishing (especially re: phrasing) before it will be ready. The playing, however, is proficient. The rhythm is spot on and the melody never wavers, so at least the instruments lay a solid base (though the sound engineering is inconsistent).
As sung, it sounds as though the poem is being relied upon to tell the story on its own, but really that is not enough. The singing of that poem should bring the story to life. Expression and cadence should illustrate and punctuate that poem to inflate those words with meaning and power, but right now it sounds more like it is being dreamily recited by rote (I hear words rather than sentences, events rather than stories). I speak of the difference between a statement being read by the Chief of Police on the evening news v. the Mayor following the Chief with the reassurance to citizens that Something Is Being Done and Look To The Future. I hear some effective use of this with things such as the swell/increase in complexity on "spark" and witholding the entrance of the male voice until after the light and flame (thought I would have witheld it until "the others"), but they are so isolated (and rare) that it is pretty much impossible for a listener to really get lost in the performance.
Honestly, my biggest criticism is that for a song which is apparently supposed to try to convey the idea that "things will get better," it feels like it gets mired in those minor harmonies near the end, as if it is has trouble climbing out of its own hole. If that's what you're going for (since you say this is the beginning of a longer piece), then that's ok, but if this segment is supposed to stand on its own, then there should probably be a bit more development as that glorious dawn gets built rather than just shyamalanning it home in the last chord the way it does now.
The best advice I can give (non-professional that I am) might be to record a performance where, throughout the entire recording, you imagine that the listener is sitting in front of a screen where the story depicted by the poem is unfolding, but with the sound muted. You, the instruments, and the other singers are positioned just beyond the listener's peripheral vision, and it is your** responsibility to narrate the action as it unfolds, as well as set/guide the mood as appropriate. You are not supposed to pull the listener's attention away from what is happening on the screen, you are merely there to accompany it.
--Patrick
*As in "without care"
**"your" as in "all of you," not just "you, the individual"