Hey Peter, great piece. I had a couple of comments from the judging that I hope are helpful. Take or leave my comments of course :D
You got dinged a little because we felt that the overall temperament of the piece was somewhat flat compared to the other entrants. I think one problem is that your drums sit very aggressively in the mix, and take away from the changes in orchestration that you provide. The overall impression is sort of a relentless smash-smash-smash that makes the piece difficult to listen to. Even the softer sections still have FFF drums smashing away. You have a great melody buried in the mix at the 3:00 mark, I'd love to hear you let that really soar, but to do that you have to bring the drums down a little. If you try to emphasize *everything*, you really wind up emphasizing nothing.
In your orchestration, I think you'll get a more powerful sound if you use your horns in a percussive way. One of the things that Zimmer does is to use like 8 or 16 horns in a little cluster, and it goes "blat" in a very satisfying manor. Check out Stravinsky, Rite of Spring for some similar effects. So, the idea is to not just use single-note melodies in the brass, or even other instruments, but really fill out the harmonies and use extra instruments to provide depth to the sound.
Great work overall, congratulations on the top 8! A very professional sound. I know its difficult to get epic sounding drums to punch through like that, and you have that nailed here, so hats off.