Doug
I don't think there is any confusion between the OT and NT with regard to the relationship of Father and Son. At the time that the OT was written God was directing the worship of his people to Himself as differentiated between the many gods of the surrounding nations. But when God's son came down and faithfully sacrificed himself in obedience to his father, God bestowed all "power and authority" upon him. He fully represented his father. But he is never equal to his father. They were one in purpose and cause even as Jesus' disciples were "one" with him. "My prayer is not for them alone. I pray also for those who will believe in me through their message, that all of them may be one, Father, JUST AS YOU ARE IN ME AND I AM IN YOU. May they also be in us so that the world may believe that you have sent me I have given them the glory you gave me, that they may be ONE AS WE ARE ONE: I IN THEM AND YOU IN ME." (John 17 20-23) This seems very clear and understandable in contrast to the confusion of the trinity doctrine.
God's revelation is progressive. And this was certainly true of the revelation of his son.