Cool tune.
I can hear a "hint" of boomyness like you said but I probably wouldn't have even noticed it if you didn't mention it.
Maybe the mic was a bit too close to the soundhole, or it could be your room, or maybe your guitar.
I had the same problem with my room so I put the mic in the closet in front of all the clothes and recorded into my closet. Helped a lot. Now I can mic at about the 15th-17th fret without any boomyness.