"original" can be associated with the origin of the link and lead to confusion if not read carefully.
Also, the third example seems to have been copied from the prior example but not fully adapted: "original/file" should have said (if I'm reading this correctly) "original/folder".
-T is not present on my system, and the behavior itself is completely unintuitive.
How exactly do you overwrite a directory? Do you recursively delete its children?