Here's what little I can add:
First off, I think you know it needs to go somewhere else now, but you've got to end what you started. I'd hold that last chord until beat 3 just to close out that idea and go into whatever comes next, but I don't know what you plan to do.
Bars 8-10: Violas are fine. I think what you might be looking for in the woodwinds here is to make that second eighth note in the flutes into 2 sixteenth notes, to bring them into the melody. Also, 13-16 looks good enough for the flutes, as far as I can tell.
In 16-23, you may want just to change it up a bit and give it less of a tutti feel. That's all I can get from it.
Otherwise, it sounds good! It's certainly traditional, but that's not a bad thing. Well done!
P.S. I know this is something more fit for editing once you've actually finished the piece, but I think you need to change up some dynamics to bring out different parts here and there.