"But also I think you should post an idea to suggest a slow decay of installation score based on whether the character is permanently gone (the bit has been erased) or if they haven't logged into the game for x amount of time (talking likely months here)."
I think this is a good idea and fixes the issue where players who skill into installations can install things that can never be removed in the lifespan of the game.
Installation decay can simply be tied to if somebody's PC is inactive for months, then things start decaying, or a slightly less fun (imo) way is you could make installations take monthly maintenance so the installer has to come back to the furniture and redo the bolts or something.
this is piggybacked from a thread on game problems and complaints where peeps were talking about how it sucks that certain PC installed objects installed by people who specced specifically for installs and had PCs for years can no longer be uninstalled even by PCs who are pretty skilled with installs. Really annoying issue, especially when it comes to old, old camera systems