Hey Jason,
I noticed no one responded to you yet, but I downloaded the MP3s and gave them a listen. I think it sounds pretty good, but I don't think you get too much benefit out of doing a matrix for an acoustic show like that. You certainly get some as it can help clarify the guitar parts and all that. Did you just set the aud at a constant setting, or did you shape it in? If anything, I'd bring the aud up at the end during the applause to get a better feel for the room. I take it the mix is for the girl performing? Do you know what she's expecting? When I do a mix on my own, I do it for my ears, but if someone has asked me to do it, I might try to get an idea of what they want for it before I settle in. Make any sense?
Good luck!
--hoyt