Since EECH includes the option to “fly any helo” you can hop into any helicopter in the game and fly missions with it. My particular favorite setup is flying a Kiowa with an AI Apache as my “muscle” and flying together as a hunter-killer team. The Apache and Havoc cockpits were imported (and improved!) from EEAH so you get the functionality of those cockpits as well.
And not content to leave well enough alone, the modders jumped into improving the default Comanche and Hokum cockpits with much higher resolution lettering and graphics on the buttons and cockpit labels (difficult to see in this shot but if you are playing and zoom in the text is crisp and clear!).