Great track, but programmation, arrangement and mix can be better.
To begin, your spiccatos lack dynamics, try to make them more wavy (fade in fade out, fade in, fade out with velocity etc).
Your melodic lines (horns and choir) need to sounds more human, more fluid and expressive. The attack of each notes are too similar. Try to attach those notes to make lines with a pause between each line. Avoid samples repetition and use many articulations presets if you can (depending of your sound libraries). Adding to that, use midi CC 1,7,11 etc. You can watch/listen to live orchestra. It would definitely help.
About the mix, your strings, horns and choir have enough reverb to me but the percussion are too dry. I don’t think the horn needs necessarily more reverb (I think the notes are just too detached and it make it sounds dry). If you add something to it just make the tail of the reverb longer a bit but don’t make it more wet.
Your instruments are fighting too much at the same places in the frequency spectrum. Your spiccato could be more brighter, crisp. Your french horns could peak more in the 300-500 area and the choir more in the 600-1600 area. All your instrument needs a bit more definition (hi mid and treble) except for the double basses (it needs to sound more bassy to me so cut it with a hi shelf maybe around 120hz (it will sound more bassy and let more place for the other instruments in the mid and hi). More sub is needed on your big toms/bass drums and double basses. Use the full spectrum, each element needs to peak somewhere more than the others.
About arrangement, I would hear trombones playing harmony under the horns near the end and trumpets over.
Sorry for my maybe not perfect english.
I hope it helps!