1:30 onwards... THAT'S WHAT I'M TALKING ABOUT!!!!
There's very little I can comment in regards to "wrong" with the piece. The one thing that gets me is the ending... I think it could be better... perhaps a Sus-4 to Maj resolution in strings and either a sfortsando or a fade out on the last note, as well as a rallitando throughout the last few measures of the piece and elaboration upon that gorgeous yet incomplete-feeling trumpet motif at the end, but in more of a mezzo-piano dynamic with gentle motion below as it closes out, then the strings fade.
Also, consider making your timpani part more involved and adding a snare part.
I would love to see you analysis of the symbolism of the piece! I think it sums up the ideas well and I love that you used some previous motifs in a new and creative way to achieve that feel.
As always, keep compos(ed/ing)!
-Samulis