Well, yes... As stated above, the Nocturne is currently being practiced by DinaHeartX. So far she's been able to play the first section at a slower tempo ;) ... As for the Sonata, no one has dared yet...
Thanks for asking, though...
MIDI is Ok, even on the graduate level. Score preparation is VERY important. Therefore, go ahead and use your EW. just make sure your scores are infallible.