Problem: I want to compare deleted content to live revisions under the same title, or live/deleted revisions for a different title. This is especially useful to check whether a page is a substantive copy of the deleted content and is a key tell to determine whether the author is a sockpuppet. I could do this via Special:Diff or the API... but it is very difficult to discover the revision ID. There should also be associated UI improvements to page history, Special:Undelete and Special:Deletedcontributions to integrate this functionality. The ultimate goal is to demonstrate some user conduct partly based on deleted content.
