The melody you've written here is really lovely. Hearing it repeat many times in different instruments, I couldn't help feeling I might have liked you to vary it a little bit more. Even some small, almost arbitrary changes might make for a special moment which stands out.
The harmonies seem unsettled, ambiguous, and anxious. All the suspensions make me feel nervous and excited, although you linger (beautifully I might add) on some very lush chords for your strings. As none of the harmonies ever seem to reach consonance this track has the ability to loop easily. But you've marked this as a "miscellaneous song" which suggests that you want it to stand alone as a piece--if this is the case, I think it might be very satisfying to end with a slow, deliberate Eb major chord (which I more or less came to expect... and never got!). Also, I agree with what David said about the low end, and want to add a suggestion: perhaps you could save the really powerful low notes until the second half of the track. I think this might give the ending a sense of purpose and inevitability... two attributes from which I think this music could benefit!