In the Move As and Copy As dialog boxes, pressing END moves the cursor to the end of the file extension. It would be nice if it would move to the end of the file name first, then to the end of the file extension after pressing END again, just like it does with in-line rename.
Also, it would be handy if these dialogs supported the "/" character so you could Copy As or Move As into new directories like you can with the rename dialogs.