I like your playing. It sounds like a hard song to play. I agree with everyone that their needs to be more low end on the piano. It seems to compete more with the strings because of a lack of low end.
Instead of rolling off the low end piano have you tried using a multiband compressor on the piano? seems like the higher range is boosted a little too much. Just a hair which seems to amplify the lack of low end.
The arrangement is good. I listened to it through my bose surround sound and if their is a lack of low end on those speakers then the low end should be brought out more.