I’m out and about at the moment and not being very productive. But I have just noticed that Daniel Kirk is doing some posts on narrative theology and its relation to biblical theology and systematic theology. He has some good things to say, too, about how we persistently refuse to let scripture speak for itself because we think theology knows better. Have a look at What is Narrative Theology? Pt. 1: Narrative Theology and Biblical Theology and Narrative Theology and Transformed Meaning.