That was what made it a compelling story, the sort of feeling that it was exclusive to lelouch and that he might be able to defeat the emperor because he alone has that potent power. However as more and more people get a geass, it becomes average and typical. So it becomes one man and his followers versus a mighty empire. That sort of story is like something out of bad shonen. Not that the show wasn't generic in a lot of ways to begin with, but it was sort of cool the way it was in s1 until you got to the mind reader.