In order for 3rd-party tools (such as Unhide Elements in View) to provide better alternatives to "Reveal Hidden Elements", we need to be able to see modifications to linked elements (not just host model elements).
Otherwise, it's very difficult to unhide something using the OOTB "Reveal Hidden Elements" tool, and Autodesk seems determined to do nothing about it (as evidenced by the many ideas to improve Reveal Hidden Elements).