Have the possibility to let R# list all un-used methods and properties of a class.
In large projects you often have internal libraries, meaning public or sometimes internal methods. Quiet often all public methods of certain classes or assemblies are only used by the code in your solution. When you have classes that have 100 public properties, it's quiet useful to be able to find out which are no used anymore. The Alt + F7 (find usage) works but doing it on each and every property is very slow.