The “customize” gear for the pages that list Devices, Entities, and Helpers, and anywhere it would be useful, would benefit greatly from being able to see the entity ID without clicking on the object, then the object name, then the settings button. Instead I would like a column (or available column by using the customize feature) inside the list itself.
While I agree it would be nice to have there as well, in the mean time the Developer Tools → States page has this information without having to burrow down multiple levels.