But, what would happen if we didn’t just assume that the divine persons must be identical in every way except for the illusive categories of relations of origin? Why must we assume that the Father, Son, and Spirit must be exactly the same in all of their characteristics in order to be equally and fully divine?
I found it especially interesting that the perspective he criticises is the one that starts with the Father (and the Father's attributes) and then ascribes them to the Son and the Spirit. From that starting place, I think his argument carries a lot of weight. However, the proper starting place should really be Christ, the Son. If Christ is the revelation of God, then the Father is like the Son. Anything visible in the Son is true of the Father because the Son defines the Father.