Probably not exactly what you're looking for, but a solution to some of the mentioned workflow issues nevertheless in case you're going for a full band arrangement.
I'm a guitar player myself, but I always hated having to redo acoustic rhythm parts over and over again, as the song evolves.
So nowadays I'm using BiaB realtracks (i.e. real recorded guitars, arranged in BiaB, exported as wav) as sketch rhythm guitars during the composition and arrangement phase, of course only basic rhythms, no fancy embellishments.
Once the song structure is final, I record the real acoustic guitars and ditch the sketch guitars.
- I always have a timing-correct rhythm guitar track to work with from the beginning, changes are only a matter of minutes (for the wav export), so you feel more confident actually experimenting with chord changes, breaks, pushes and stuff.
- when recording the real acoustic track(s) I have the full arrangement to play along, much easier to lock in with the groove.
Sorry for the slight OT, but this method works extremely well for me.
When you tear out a man's tongue, you are not proving him a liar, you're only telling the world that you fear what he might say.
(George R.R. Martin)