First and foremost, no stress about this mix, even if it's not perfect. I am more impressed by the use of live instrumentalists than anything! You redeem yourselves with an incredibly rich story, beautiful atmospheric music, and a lovely closing track that was one of my favorites of all the 30 soundtracks I've listened to so far :)
My only advice, moving forward, is that a tighter mix with less reverb will benefit you! Instruments with more attack will sound less loose and delayed. Other than that, the music itself is quite beautiful and this is very well done! Keep writing!