I stopped listening to what i was already listening to when i saw "impressionist". a lot of my favorite composers/music comes from that time period.
after listening i do believe that there isn't enough source usage in this. there is usage of the source, but not enough to pass the panel. it gets very interpretive at parts and while still bearing some resemblance to the original, i don't think it's enough.
on a second listening even the source comes out more, but i think those specific lines that have the melody or fragments of the melody could be brought out more.
i'm coming up with something like less then half of the arrangement is derived from the source.
gorgeous arrangement, and very impressive work. i'd die to see more of this kind of work around (albeit with a little more source)
don't give up on it yet!