I found that book quite remarkable. I didn't find it very informative until about three-quarters of the way through when he tied everything together and then the book proved awesome.
Well, I could say the same thing about it not being informative (to me and to you) because we already had that information, until farther into the book. However that does not mean it was not informative. I will clarify what I mean by that.
Even though it was not new information to me (it would be for many who had not yet connected all the dots he connects), I think the foundation laid was so well done as to be a good book to give to the unsaved, or those, like many in my family, who shy away from Christianity because all their experience with Christians has been negative. So much so that even hearing the name of Jesus causes a negative reaction related to that experience. You start to preach the gospel or say anything about God or Jesus, and they shut down.
And this is the negative experience I am talking about: the extreme legalism found in much of what we see and hear. My daughter-in-law for example was raised Mennonite, and people were judged solely on their behavior, dress, what they did, with the "rules" established by the group and not the Bible. Then there are the self righteous displays of being a Christian, an aura of being better, superior, people than everyone else. And the displays period. Those of making every situation an opportunity to make a public display of being a Christian. What this does is completely lose sight of who Jesus is and why he did what he did, its necessity, and only way. It doesn't show the mess we are in, how we got in that mess, and how God himself comes to us in the flesh to undo that mess. The displays and hypocrisies and judgmental attitudes, do nothing to reveal Jesus and make Christianity abhorrent to many. They are afraid they will become just like that or will never be able to measure up. So they don't even like to hear the name of Jesus. Not to mention all the false displays that are shown and seen such as with the Charistmatics, and the money grabbing, and the ludicrous, kooky, teaching of the "rapture".
So, the groundwork absolutely teaches who Christ is etc. and can change all the preconceptions and misconceptions that have been presented in real life by Christians. It draws one to this Jesus the book presents, instead of repelling them.
Christianity is about Christians being little Christs within the limitations of also being created creatures. Williams' book focuses on the redemptive quality of Christianity and how God has acted to redeem creation throughout Biblical history and, near the end, the Christian's role as agents of redemption.
This is just my opinion, not something to debate; I think the expression "little Christ's" should not be used. Even with your limitations added to it. And even though I know what you are saying.
I don't normally limit Christianity to redemption, partly because there is a purpose to redemption that may not be addressed when redemption is the focus.
I don't think the author was limiting it to redemption. It is just what he was writing about, in connection to who Jesus is, and he did extend it beyond the redemption of people to the ultimate purpose of redeeming people. Or at least I have. It has been awhile since I read the book though I am starting through it again. It is the serpent, and therefore all sin and death, that is ultimately being defeated and destroyed by Jesus, and a new creation taking its place. That is something I came to understand before I read the book, and I learned it from the Bible. So some things are a matter of learning and growing.
I want to address the rest of your post but I need to think long and hard about it, need coffee, have to run an errand, so will get back to it later.