I am more thinking the limitation is more the stage of the EA this is all that. No point customizing an area for a companion that might radically change to be an entirely different character.
Story wise they still could customize the camp if it is to be our hub for Act 1, but the customization might be limited, so my wants are likely more late stage. Though i would love to see them move around more and do their own thing.
And for what i am hoping will be our permanent hub from Act 2 onward, I would love to see be done like WotR where the area really feels affected by what companions have been recruited, or at least what Origin companions have been. With notable Non-Origin companions also affecting the area and not so notable ones doing whatever activity makes sense for them.