In "Manage Messages" and "Manage Support Articles" within the Impact Dashboard you are able to toggle "Created by" and "Last updated on" for articles and messages, but you are unable to see "Last updated by" which would be really helpful to see who was the last user to edit a message and/or support article.

To expand on this idea, it would be nice to also see "revision history" to see all Impact users who have edited the message since its creation.