Two things that would be helpful in the list of article versions.
  1. An accurate date/time stamp (created and last saved). Currently any version you load shows the last-updated date and time of the most recent version. That's not really helpful.
  2. The ability to enter, edit, and display a description for a version. Not only would this help if we need to quickly find and republish a prior version, but it would help if the feature suggestion to delete versions is ever implemented.
Not sure where the version description would be entered or displayed, but the additional version information could be an info popup as shown.