Howdy,
I'm not a keyboard player, so I can't comment about how hard this arrangement would be to play for most pianists. However, I made a small tweak to the listening aspect of this file. I set the Pan for the top two staves (pianist 1) hard left, then set the two staves for pianist 2 hard right, so it's like I'm sitting between the two pianos. That gave me a little better perspective on the interplay between the two pianists. I really enjoy Copland, and this was a very satisfying listening experience
Looking forward to hearing more!
Sherry