i completely agree with gms. creating your first orchestral is a great personal accomplishment, but with your transitions i think it would help to write smaller works, especially to learn more of how the instruments work. if you look at my "untitled 16" posted here, its a mirror image on the problem with your piece (not that there is a real problem, just with the transitions i mean). ive written chamber pieces then and know more about groupings doublings etc etc. as far as your musical content, i think you did a superb job and i loved it. hope you stick around mate, cant wait to hear more of your stuff!
vince