let's face it.
You can't do justice to Peter Pan no matter what.
Though there are some parts where the book is reminisent of J. M. Barrie's tone, mainly it is average. A bit cheesy too. You might want to try Peter and the Starcatchers by Dave Barry.
I think it was perfect. It shows how our actions effect others, changing them from once happy, worry free dreams to grumpy, miserable, and lonely people. It shows that everyone has emotions and that you can't just leave and expect things to stay perfect. It shows that every action we do has an effect and that we all need to make hard choices.