Really nice.
I can see the balance issue mentioned, but it's not that obvious in my (crappy) hearing - might just be the frequency weighting of the main accompaniment guitar? (I.e., something that might be left to the ME.)
Tiny nits:
I'd probably automate some of the vocalist's breaths a little down, because on a couple listens they start to become more obvious. And if you have access to RX plugins, I'd consider trying to tap out some mouth-clicks. If this gets a heavy-handed mastering and boost/compress much I think these'll haunt you.
There's one guitar note right around 1:52-53 that goes plink in my ear. If you have another take that is better I'd probably punch that in. Some of the finger-on-string sliding around on the fade out is noticeable to me but pretty well handled here. It can be a personal taste thing (and hard as heck to do anything about). But, for me on close listening in a set of cans, it intrudes. Maybe a future technical/playing thing to work on to have an option on how much to use.