That is some great data! I can do some confirming on the unsubscribe thing, but I think it'll just be the same as what you've found.
One additional thing I noticed - In my test park where I placed the red and blue objects, I had said that the objects both became blue after I had uploaded the blue object over the red one in the Workshop.
After deleting the object from the workshop, both objects remain in my park (because I have the original, separate red and blue.pcugc files I downloaded from the TMT), but both objects in my park remain blue like the final test object.
I thought that was kind of interesting, though I'm not sure how relevant it is for any real-world situation.
One additional thing I noticed - In my test park where I placed the red and blue objects, I had said that the objects both became blue after I had uploaded the blue object over the red one in the Workshop.
After deleting the object from the workshop, both objects remain in my park (because I have the original, separate red and blue.pcugc files I downloaded from the TMT), but both objects in my park remain blue like the final test object.
I thought that was kind of interesting, though I'm not sure how relevant it is for any real-world situation.