Really nicely done!
I would have to say indeed that this isn't as sad as I think you may have been aiming for. However it is a good background theme song to say... a devastated battle ground littered with the fallen and a lone warrior standing among them. I guess it isn't so much sad, but it has a melancholic sound to it. A kind of feeling of regret of what had just perspired.
I think it's really well orchestrated. Keep up the good work.
-HFX ^_^