Unity Shortcuts: Key to display the keyboard shortcuts overlay (Hold Super) conflicts with many other shortcuts, it should be changed
The Super key is currently quite overloaded with functions as tapping it makes the Dash appear (which is good and intelligent design), but holding it makes not only the Launcher plus its shortcuts appear, but also the "Keyboard Shortcuts" overlay.
This conflicts with many other standard shortcuts, like all the Super+Key combinations and also standard Compiz combinations like Screenshot (Hold Super+Left Mousebutton), Enhanced Zoom Desktop (Hold Super+Mousewheel Up/Down) and many other Super+* combinations making the great idea and helpful solution of an easily accessible keyboard shortcut info pop up annoyingly often and very often unwanted by the user.
I know that there is a possibility to change the shortcut key for all of the options (Dash appear, Launcher+shortcuts appear, Help Overlay appear) at once, but this makes just another key be overloaded.
I know that there is a possibility to turn the overlay off completely, which is a good thing also and fixes the problems mentioned above. But it also removes all of it's great functionality for newbies.
Nevertheless there unfortunately exists no possibility at the moment to assign another key/key-combination to make the "Keyboard Shortcuts" overlay appear and detach it from the others (Dash, Launcher).
We could keep it's full functionality and accessibility and fix all of the problems mentioned above without removing the overlay completely by detaching it and assigning a configurable shortcut exclusively for showing the "Keyboard Shortcuts" overlay.
My suggestion here would be to use holding "Ctrl+Super+Alt" to make it appear. This would not interfere with anything and would still be easy to remember and easy to access.