I often hear some variation of this response to the Euthyphro Dilemma. I even wrote about it recently.
Your response seems to be that neither is the case. As Dr. William Lane Craig puts it “God wills something because He is good.” This strikes me as a textbook example of begging the question. Is God’s nature objectively good?
I have brought this issue up many times and have not been able to a response from Dr. Craig or anyone else on this particular concern. Given that you are a lecturer in philosophy I am optimistic that you can help me understand how or why this is not seen by theologians as begging the question.