Yeah! It would be nice to stumble across the odd ruin in space... no longer spinning, or spinning on a tilted axis. Rusted. Gaping holes from meteor/asteroid impacts. That would add some great atmosphere... I'm just not sure how it fits into the canon! Regardless of circumstance, I'm sure a trillion-cred investment in a spacestation would at least mean it was towed and/or salvaged rather than left to rot.
Now, ALIEN artefacts and ruins - mysterious, unknowable - what were they? Stations? Exoplanets? Derelict ship hulks? I'd love a bit of THAT scenery!