What specifically are you saying? How is it watered down? I haven't read the book so I don't know. I've heard praise and criticism, but I would really like to know specifically what you are talking about. Where's the problem exactly?
The method used in making a church "Seeker Friendly" is to make the sermons more soft, to appeal to a wide group of people through compromising the Gospel message. There is not much talk of sin, salvation, or the Blood of Jesus Christ to atone for sin. It is about doing things that "feel good" and "personal relationships" etc. Do yourself a favor and do some research and you will find what I am talking about.