Unified diff for multiple files
In SVN there was a great feature that allowed you to select multiple files in your "Local Changed" window and the press "Show unified diff".
This would compare all the files and show you all the changes in one window.
It would give you information inbetween the changes to let you know which file you were viewing the changes at.
This was great when you did a "rename" on a variable on hundreds of files etc. Allowing for quicker code reviews ( that are important at our company ).
Doesn't "find in files" during diff help with this? Maybe you didn't know the feature exists, I don't know :-)