Wow, thanks for all the feedback. Yeah, I definitely was worried about the nasally sound, but ended up way overdoing it. I re-EQ'd the violin and just compressed the very high end a bit. I also centered both instruments and just made the piano a bit wider. I added a bit of different reverb to the piano, but I'm not sure how much I like it.
Here's the new version.
Let me know what you think, and thanks for the praise!