According to the Lore panel, they had NOTHING written for him until Golden wrote this book and pulled him into the storyline. So there really is a lot of room for him to grow up.

Don't mistake idealism for naivete though. This is a kid brought up in a world of politics and court intrigue, with Onyxia on one side for a good chunk of time. He figured out something was wrong with Prestor and "Varian" before many others did. He's watched his father struggle with his split personality--and is really set up opposite of it so far, a very different person from his warrior father.

Anduin's young enough to believe in a better world and hope, all optimistic and idealistic. It does need tempered with experience and practicality, but I don't think as much naivete as some think. I for one hope he doesn't turn as growly and hateful as his father can be.

I Fear I disagree on this one:

Really, do we want to dis-regard Anduin just because he's a Teen that is smart and sensitive? REALLY?

I work with youth (teenagers) on a regular basis and... O.M.G. Many of them do not fit the shallow stereo-type of teens!!

There are kids that are Wise Beyond Their Age. Get over it! Anduin is NOT a total mutant!