Originally Posted by Ireland
The funny thing is; the Mission Control key works. This is mega-puzzling and quite annoying.
Mission Control and Launchpad seem to be apps that toggle the behaviour of the Dock so the hotkeys should be able to address the Dock process directly and do the same thing. If you erased Launchpad and Mission Control, the functionality should still exist in the Dock app.
If you right-click the Mission Control app you extracted and go to Contents/MacOS, can you double-click on the Mission Control file? It should open a terminal window and toggle Mission Control.