The main menu should have save game and load game in it rather then having to press other keys for it, maybe some options like sound volume, etc. Other stuff which can be toggled as well like Pause, Network Status, Chat, Take Screenshot, Quicksave, Quickload, etc. Keep the shortcut keys but adding some/all/more of these to the menu when you press esc just adds to its 'professional look' or something like that, newer users will find it easy.
