The Google Camera was made to run on Pixel devices, whatever HALs, libs, permissions, etc, not in AOSP already can be extracted from the device itself (and it's not a lot, lol)
This is VERY valuable knowledge - thank you. Camera performance is paramount for me. You just saved me hours of work and worry wiping, flashing, setting up PA and maybe Lineage, only to have to revert back to stock due to image quality issues. Hopefully someday camera source code may be made open, or maybe some of the brilliant devs out there may figure out a solution.
My cam works just fine, if this is the first time being on a Pixel for some of you, then you're stressing about nothing, lol, Google Camera was made for Pixels.
I can't speak for this PA build because I haven't flashed it, my builds have everything stock has, plus some. I can still use my camera to zoom @ 30x, the macro works as expected, now playing, etc, etc
There's only one way to see if a custom ROM is right for you...
That's my two pennies...