Your first point leaves me with one question: If narrative theology dissuades “reductive and rationalizing theological schema” while allowing “a diversity of perspectives without having to arbitrate between them” Then…

Is that to say that there is never a need to arbitrate between theologies? That hairs never deserve to be split? That doctrines such as the nature of Christ are so unimportant that we should not only seek unity but establish a framework for our doctrine that forbids any debate?

There seem to be an awful lot of refuting false teachers and false doctrines in the epistles, and nobody told any stories to do it.