In the document's admin interface , where we add values for both author and editor, we need to be able to add in an author from the document entity record. Currently, we can only select from a list of pre-created authors.
I see the value of saving each author as a unique entity, but this also adds a lot more complexity in terms of how people can add records; we need to make sure this is easy and that the burden of creating new author doesn't prevent people from populating this field.