Yes, I agree that Hook is disappointing, but as you say, Spielberg did acknowledge the source material - in his own way. I think it's worth noting that not only did care about the original story, but he also cared about Barrie's legacy. When he visited Great Ormond Street Hospital prior to making the film, he was so moved by their work, and so taken by the story of Barrie's gift of copyright, he personally donated $1m to the hospital.