Users-per-page in User list (User administration) should include much more columns than actual Name, EMail, City, Country, Last Access. Other columns should include Department, institution, Username. Also courses where a users is a student or a teacher should be shown. Off course this would generate a page too large for standard screens. User should be able to hide unwanted columns. User (admin) preferences for shown/hidden columns should be saved in user preferences or at least in Session, as admins from the users list often go to a user profile page and than get back to the user list