I want to give you a suggestion if you don’t mind. There is a problem that the authors can see each other posts via the dashboard. Though you can restrict them to edit or delete but allowing the authors to see or monitor the activities of the other authors is not a good idea in my view. Further, the same case is with media. Authors have access to all the media that have been uploaded on the website by the other authors. Each author may be allowed to create his own media but they should not be allowed to see other media. In short, There must be complete privacy designed in the theme where each author can see and access his/her own posts, media, etc. This suggestion is also coming from my authors on my second website. I suggested the same to the theme author being used at my second website but they rejected the suggestion by saying that they know what they should have in their theme. End of discussion.