Created a user, observer, with the role Observer. The user list, though, does not now show the roles. It did in 1.2. Please see attached image. Not showing the roles means that important information is less accessible than it was previously. one can click on the user to see a dialog that shows the role. but that is less useful than showing the role in the list of users.
You can click on username to see role. Also from API we can see user's role too. Got additional functionality of grouping in 1.3. The user can be associated with multiple groups/roles and hence it would not be feasible to show all the groups and their roles in the main page.