Nice WIP, I think you're a little dark horse waiting to get a bit more noticed for your audio talents. Keep it up.
The track is great and it's actually right up my street, I love this kind of build up orchestral composition. I did find the brass and Woodwinds a little strong, over your strings. So consider pulling them down a bit in the final version. I actually think you don't want to milk the build too much, and 6mins is quite long for the repetitive nature of it, and type of track. So consider possibly bringing that down to half the time, but make bigger jumps.
Hoping to see a lot more from you.