It is well known that the permission "Modify Identity" controlls the ability to modify Number or Filename of business objects, while the permission "Modify" controlls - among others things - the ability to modify the Name. During a short period of time in Windchill 10.1 M040 "Modify Identity" enabled the user to modify the Name without the need to have "Modify" permission as well.
But in Windchill 10.2 the behaviour switched back to the well known one. Since not all business administrators want to enable Roles for Checkout/Checkin just to enable the Rename of Number/Filename/Name, it sounds resonable to couple the ability to modify the Name with the permission "Modify Identity", like it was in Windchill 10.1 M040. In order to avoid conflicts with existing installations, where this behaviour might be unsuitable, it should be configurable by a property or preference.