I think its fair that he has his say.... he knows Nick better than anyone, so how could he play the role well if he's rehersing lines he knows Nick wouldn't say? To a point, the actors need a license to change things if its for the credibility of maintaining the original character as best as they can. Too many characters return and have changed dramatically, so fair play to him for caring about his work. I'm surprised they wrote certain things in differently to be honest, knowing his history....