Do you have a feature like "Modified By:"?
For example I have 20 technical supports in my team, some of them is adding users in OU, some of them is modifying the group policy, etc., I don't know which of them is adding users and I don't know which of them is modifying the group policy. A feature like "modified by" would be a great help, so that whenever there is a problem I know exactly who modified this object.