And PC inevitably makes me think of Hamlet, another flawed protagonist, although from what I know of C.S. Lewis I doubt it was his intention to make that parallel. I think it's interesting that he doesn't allow either Caspian or Peter to kill Miraz. It's certainly not due to a squeamishness about the idea of the boy kings killing men in battle, because Peter lops off somebody's head immediately after Miraz is treacherously killed.

I have a theory that he didn't know what to do with the adult Peter because he'd made him Too Good. Even Lucy is allowed some flaws.