Boy, at some point you have to wonder just how good - which is to say bad - you have to be to play CF for the Phillies. They have not emphasized defense at a single position, other than having a star catcher who excels all-around. Harper, who's up and down, is probably the second-best defender relative to his position. And Moniak hasn't established himself as a great defender either (or played a single inning of CF in the majors).
So what I'm saying is, it's still kind of hard to believe they so firmly refused to let Williams play there. At this point they might end up with Brad Miller (or Harper again).