ill agree that the book wasnt that well written. but i also want to think that a lot of big name actors turn down these kind of roles cause of the pressure to be able to pull off a good book to movie adaptation. people fall in love with books a lot more then movies. so when an actor ruins the movie, it basically ruins the whole thing overall for anyone who read the books first, at least for me.
i mean twilight, hunger games, divergent all had quite a few unknowns who had starring roles, at least to what i know.
now if they screw up the maze runner i wont be too mad, cause i dont expect the movie to ever be as good as the book is.