The orchestration is good, I'd say. I'd like to hear more melodic ideas in there instead of the atmospheric, but that's a personal preference and I understand that it might not be the style you were going for. For being more orchestral-based atmospheric music, I think you captured the image super well! The spitfire libraries sounded really decent. Some attacks were abrupt, but the balance and orchestration were good. Did you use mutes in the brass in the beginning? It sort of sounds like it but that could just be the library honestly. If not, some muted brass may have fit super well. Great track!