I would like to pitch the idea of being able to customize banners, rugs, wall scrolls, etc.
Make a bench that lets the user place an item or stack of an item say wall scrolls or screens and then allow the user to choose between a background (different colors or even dye based) then choose a main image (Pre-Selected Symbols like Conan face, Ymir religion, Stygian sign, etc.) then choose a border (again Pre-Selected Borders with color options).
On top of that you could add special books scattered about the Ghost Lands with different styles unlocked to further distinguish your bases and increase exploration.
Just an open free idea