For the cello articulations, they are quite slow -- back them up so they come in at the same time as the piano and other instruments. Same with the brass where you notice this problem. There is a bit of lack of clarity on the downbeats for what sounds like a death march.
Praise your tasteful mixing of gong
I think the timpanis could have a bit more stereo spread and volume at different points. By the end of the composition, it sounds as you have a better idea what you are doing with articulations and so forth.
2:25 if there is a snare hiding underneath, I would like to hear it brought out, and the jinglies down just a bit. They are coming out of stereo phase with the ensemble.
Choir sounds great, btw, what is it?!?!?!
One last bone of contention, I would like a bit more volume, and if not that, contrast in volume between sections, by making the bigger sections just a bit louder. Great work!