This is a wonderful and well rounded piece, but it required quite a bit of effort from me before I could really 'get' it. I have to be in a certain mood to really get immersed in this and not have it feel like a bland orchestral backdrop. And even then, it gets somewhat boring after 4 minutes or so, since each part evokes a different nuance of mostly the same mood. It was also less harmonically interesting than, say, Children's overture (though 1:46 through 1:51 was nice), and the instrumentation felt a lot blander than in Alpine. Despite your description, I did not find the dissonance to be anything out of the ordinary.
Mixing-wise - some of the notes from the strings and the cymbals were unpleasant and piercing, and the mix in general is quite top-heavy.
8.5/10