Immediately, I like the tone of your acoustics, but the out-of-sync strumming mixed with hard panning makes it very hard to listen to on headphones.
You do a good job of attenuating the volume down when everything else comes in too. That warmth could quickly become mud and boominess in the full mix.
The reverb tail on the BGvox sticks out a little. It puts them in a very distinctly different place from everything else. Maybe put a bit more reverb on all the guitars and a bit less on the BGvox to help everything sound like a similar room?