I disagree about offering more story in harder difficulties. I think that having extra difficulty past the norm itself is the reward. I would have loved if Super Paper Mario had harder difficulty levels. I'm also all for having shortcuts to special features for beating a higher difficulty, like what they did in Kingdom Hearts II, where Proud mode players got to see the special ending for just completing the game, whereas normal mode players had to go through the whole journal to see it. But I don't think content, especially story-based content, should be held back for harder difficulties only. Thats unfair to new/unskilled players, and possibly even the main market for the game.
I don't mind bonus items and the like for harder difficulties, either, but I don't want to be handed things that actually makes the game easier because you can get it.
And then, you need to think about the industry's perspective on this. They've spent over a year, most likely, on this game, and a large amount of people see games as a form of art. Now, of course they want people to see who they are, as the artist, and they have every right to place the credits at the beginning of the game. Without these people, you wouldn't have any thing to play.
And what's the deal with those airline peanuts?