This actually doesn't sound that it would be too hard to just play...
Dynamics wise, it seems like even though you have more variation from note to note, there is very little variation between sections.
Another thing to think about would be to separate the pianos a little more, it sounds like it's written for four hands rather than two pianos. Even some simple panning would do the trick. I do love the arrangement though. Can't wait to hear the final product.