I wouldn't over-complicate things too much.
Just make that certain items owned by companions won't be "interactable" unless you kill them or far later in the game until a certain rate of approval is reached.
On a more positive note, I'm ready to go a couple of months full immersion with Elden Ring, so chances are I won't be pestering Larian about things I don't like for a good while.
Meh. I can agree to that. Makes sense. Simple is usually better.
