Some of those grace note D#->E's are kind of awkward, haha. I concur that Nocturne doesn't really fit it. I don't think it needs to be in the confines of any pre-established convention...
Transition to C# major came out a little bit from left field especially with a minor sixth, but it was fine.
It's really good and flows well. I imagine a skilled pianist would know exactly what to do with this!