The Lutheran Book of Worship (LBW) is the embodiment of the ELCA doctrine and theology. As such, it is essentially the point document as it is the book that interacts directly with each and every pew sitter at every service. Errors in it are then accounted as especially egregious as they are multiplied by the constant retelling of them.
The LBW is dominated by the group of people known as liturgists which tend to be the "high Church" crowd. Unfortunately, this group is also the group that is most interested in playing church rather than being the Church and generally badly confuses the institutional church with the Church.
We can see this right from the first paragraph in the LBW:
Corporate worship expresses the unity of the people of God and their continuity with Christians across the ages. In the liturgical tradition are the gestures, sounds, and words by which Christians have identified themselves and each other. The Lutheran Confessions set out liturgical life within that mainstream of Christian worship: "we do not abolish the Mass but religiously keep and defend it.... We keep traditional liturgical forms" (Apology to the Augsburg Confession, 24).This opening paragraph is both a misrepresentation of Reformation theology and of what Luther had to say.
It misrepresents theology in that it assumes that the institutional church is required for unity (that statement says, in effect, that there is no difference between the institutional church and the Church of Christ, i.e. it takes the Roman and Anglican view of the church).
It misrepresents Luther in that when Luther talked about the Mass what he was talking about was Communion, not the rest of the worship service (or what most people assume to be the Mass). Luther had some quite strong opinions about High Church nonsense and how it is counter to being a Christian.
In short, the opening paragraph of the LBW says that it is, in fact, not a Lutheran book at all, but is attempting to be Roman (or Anglican)
After that ominous beginning, what else is there in that tome that bears looking at?