Hi Inactive User. Check out the Manage any article and Manage own articles permissions under Blog Articles. I believe those two permissions include the ability to see drafts inherently. I have the Blog Author role for the Lithium Community, for example for the Release Notes blog. I am able to see my own drafts, but not others' drafts. I believe only the author of a blog is able to access/edit their drafts.
This is one of the reasons why bundling permissions is counter-productive for users. I have made this point before. Community admins should have access to many more discrete permissions, and be able to create their own bundles. For example, a bundle of permissions would be a role, and a role should be able to bundle other roles. The algorithm for this already exists under ranking.
If the "view drafts" permission is a standalone for TKB, then the algorithm exists, and it should be simple to port it over to blog permissions. I believe I put this in a product idea some time ago.
