I have no experience in the industry, so I won't be able to help with that.
I listened to the soundtrack before I read this, and that's exactly what I was going to bring up.
When it comes to orchestral music, there is basically two ways this could be mixed (yes, I'm over-simplifiying it). You can either mix it to sound like a live performance of an orchestra, as if you were listening to a classical piece by one of your favourite composer, on site. Or you can mix it in the "cinematic" way, which dismisses the "room sound" of a concert hall a bit so that you can have the experience of "feeling inside the orchestra". This works very nicely on film, because cinema rooms can really place you within the action with their high-quality sound systems. Your soundtrack stands in the middle of both. It neither sounds like the real thing, because there is no "room sound", which makes it all seem artificial (at least for the orchestral sounds, though), nor it plays on the strengths of a high-quality sound system.
I guess it just takes practice to get it right, though, so you will surely get better at it in the future.