Over at http://www.heartandmouth.org/2017/02/21/economic-subordination-son-part-1-theologia-oikonomia/ Brad Mason sets out to understand how the early church fathers distinguished between theologia and oikonomia under the assumption that a great deal of the confusion between the economic and ontological Trinity lies with employing modern understandings of the terms versus their original intent by the ECF.
I found this paper unconvincing. The theologia-oikonomia distinction is ingrained in post-Nicene theology. There is an apparent and determined effort on the part of theologians after Nicea to clarify when they are speaking about God in Himself (theologia, or theology proper) and as He is towards His creatures (oikonomia).
It would be a shame if Dr. Grudem's false dichotomy between ontology and function were accidentally assumed and created a new paradigm for understanding the "fathers."