I wrote a piece for my orchestra director a while back as our graduating class left his instruction and I was so awful at modulations. Like, they work, but they're embarrassing. The standard issues like modulation and crossed voices are here sometimes, but generally I think the classical nature of it works, but it's too docile for the energy I see in the orchestration. I think you can also spend time on dynamics more; it's really vague and/or general when some of your lines don't exactly lend themselves to interpretation as easily.