Hey man
First off, I like this. The music is quite beautiful, and your orchestration is lush and cinematic. This could easily fill the background for some movie. The score is clean and professional looking (to me, a noob), and you give a lot of care to the engraving. A lot of people sifting through submissions of scores will not even take the time to even look at what key a piece is in if it looks like stock music notation software. It seems like you've done all you can for that, so kudos.
Do you know Muse? The first movement reminds me of Exogenesis, a three part symphonic type of work they did some years back. Check it out if you haven't, it's pretty cool. The second movement kind of had Yiruma vibes to it, maybe some anime-type inspiration?
Regardless, I think you have a talent for bringing out color in your writing. Just know, sometimes color is lost when lots of instruments are playing all the time. For instance, the breathiness of a flute can be hard to hear without subtle orchestration (or lack thereof). Not saying you did that per se, but there seemed to be a lot going on for most of the piece, and interesting color and variety can be found with extended sections of just winds, or just strings, etc. Just something to experiment with in future music.
Like I said, this to me was cinematic, like it belonged in a movie or video game. Is that what you were going for? I only ask because the themes and motifs you used were more suited for the background. After a while, the themes got a bit stale to me. Sure, it's in 11/8 which is cool, but lengthening or shortening the 3 dotted quarters and quarter would be cool sometimes. Or breaking up that rhythm. Or giving that rhythm to a different section of the orchestra while new melodies soar over it. You get the idea.
The lushness and overall texture was the highlight, but also think about the listener. When should there be a break? How long to make big tutti sections? How many themes do I have, and when/how should I repeat them, or change them, or whatever else? Think of something as simple as a song. Verse, prechorus, chorus, bridge, intro/outro. How many choruses or verses? Does it need a bridge? You mentioned how to lengthen or make changes to voices, and a lot of times just having a simple blueprint of your form does wonders for that issue. It doesn't have to be classical in form, it can be your own, but when writing for orchestra it really helps.
I never pursued the path of getting music performed by ensembles... I'm just a simple guitarist, so I can't really help with what some concertmaster or whatever needs from you. But objectively, these are some ideas I had while listening with your question in mind. Good luck to you, and keep us updated on a possible performance. If you do get it performed, do everything in your power to get a recording, because it may never happen again.
Cool music, cool pfp, and thanks for sharing