This piece is really coming along well. I love all the gradual building and the eventual climax of this first section brings us perfectly into that great brass melody. This second section really add a lot on the first section's momentum and excitement - I urrrrrrge you to write the next section softer, slower, thinner texture, etc. Any sort of tied-in contrast will do. (take one of the previous melodies, maybe focus on the clarinet bit from the beginning section and work on that in a thinner texture?)
I would love to help finish orchestrate and to score this piece! Because it's coming audio first rather than score, and that it's so rhythmically and contrapuntally complex, I know it will be a lot of work. But we can do it!
So keep working!!