Now if the action bar was complementing a menu system, where all your actions are stored and can be used from there and you can set your favorites to the action bar this thread wouldn't exist.

Now that's a great idea, menus are great, we need some of that.

Imagine clicking on a mob and getting a menu with "attack" & "magic" on it and you didn't need to be in battle mode or waste an ability to "speed engage", wouldn't that be grand?

Eorzean dream right there.