Very cool! If you don't mind, I do have a couple critiques:
1. The countermelody that plays at the end of the bar in the original is too subtle, in my opinion, being played by the backing strings, and then not at all during the brass section.
2. This feels a little short! I wish it were longer so that it could build up to the end a little more. It feels like it goes to the slow portion a little too early.
Anyway, some positives:
3. The way you turned the intro into a slower buildup had me hooked immediately. That felt like the perfect way to transcribe this to an orchestral piece.
4. Your tempo control is impeccable.
5. The choir works very well here. All in all, the mix is great.
6. The dynamics are very realistic.