I understand why some reviewers prefer the first half of the book to the second. And I too wonder whether Michael Frost gets a little too prescriptive in some of his second-half pronouncements.
Here's why I forgive and welcome those pronouncements:
First of all, he's made it clear enough in the earlier pages that we're not to use his opinions and guidelines as a substitute for the work of making our own.
Second, the issues he lists are not "liberal talking points," but concrete examples of applied discipleship. We may very well come to different conclusions, but at least we are watching someone try to say what being an exile means with very concrete examples. We wouldn't disagree (or agree, as I often do) if we didn't have some raw material to work with. For example, I think that his critique of the corporation is valid and worth considering by Christians who are active in the business world. Such Christians might be able to offer a good corrective to Frost's critique, but where else would they have even read such a critique (aka an invitation to dialogue) from an evangelical source?
I think his comments on the exaggerated importance of the weekly gathering, and on the vapidity (to put it charitably) of much praise music goes a little over the top. But I'm a grown-up; I can handle a passionate commentary, agree with some of it and disagree with the rest.
To those who haven't read the book yet: I highly recommend it, in part as a good extended sermon, and in part as a catalog of neglected dimensions of discipleship, some elements of which will resonate with you more than others. (The chapter on environmental stewardship is a more comprehensive summary of the issues involved than I've seen in other evangelical sources.) The "catalog" aspect is argumentative, as others have noted, and somewhat slow going, but every topic is worth considering, even if not all at once. I deeply respect the author's effort to make these real-life dilemmas of authentic discipleship accessible to his readership; the problem isn't what he says, it's how to keep the conversation going, with urgency and affection and honest conflict, beyond the fixed covers of just one book.