Some games have a fantastic story, onto which the gameplay is actually more of a hindrance sometimes, espeically for those who just want to enjoy the story.
I really hope this is a joke or a sarcastic comment.
Gameplay is what makes it a game. Story is and should always be secondary. If you want storys go watch a movie or read a book, I've not played one game in my entire life that has a story better than a sub-par movie or book. Surley I've not played all games ever made, but I've played enough game to make this blanket statement. What I can give some games credit for is, in some instances is interesting worldbuilding and/or atmosphere, but story always simplistic.
Back on topic of difficulty:
I thing I would like to see being used more, that was a thing in mainly older adventure game (like the Sierra kind), is games that allows the player to actually fail. What I mean with this is that some action/actions (or in action) you make in the game makes it unbeatable later on. This without actually telling you that you made the wrong action when you make it but leaves it up to you to discover it further down the line.
This is a pipe dream tho since all the focus currently is about accessability and all that crap.