This is so legit from a classical composition standpoint. It's clear you've mastered many parts of composing for orchestra. One piece of feedback I'd give, which is something that I also struggle with, would be to work on your MIDI automation on your strings. There are parts throughout your piece where I want to hear the instruments swell and breathe more than they do. That could be achieved through controlling the expression or dynamics of whatever sample libraries you're using. Thank you for sharing!