Your programming & mixing is good for the most part. It's not holding you back. And you can definitely have that solo violin line if you want. It wouldn't be heard live but this isn't trying to be a realistic live piece, it's trying to be cinematic, and succeeding.
Where you can advance as a composer is trying to study structure more and widening your influences. Your sense of structure is not yet enough to support a 3:45 piece. Try and write a piece with just one idea for 1:00 or just two ideas trading back and forth for 2:00, when you are able to easily do that then you have advanced your sense of structure!
Being influenced by Zimmer is not a bad thing but when it's your main or only influence it really shows in the music, things like the string lines at 1:24 and the lowbrass staccatos augmented by percussion at 2:42 are clearly from Zimmer scores. I'm not going to say "develop your own artistic voice" because the truth is all art is a collage of influences, what I'll say instead is widen those influences and really try to get inside the heads of other composers. You clearly understand how Zimmer would communicate a sense of urgency & drama in his scores, now how would Mozart do it? How does Rage Against The Machine do it?