My dissertation is entitled "Metaphor and Divine Paternity." I started forming the ideas for the work after talking with a friend about the possibility that God might be an emblematic father rather than a literal father.
The research that I undertook moved me in the direction of God's metaphorical fatherhood. The divine metaphor "Father" is old and it seems to harmonize with other figures used to reference God. But I also believe that the metaphorical view undermines the eternal generation idea. If Jehovah is a symbolic father of the Son as opposed to being a literal father, then the eternal generation idea loses its force. If Father is a metaphor for how God relates to his Son or to creation, then the Son's eternal generation becomes a moot point since Jehovah has not literally fathered anyone.
2 Sam 7:14 teaches us that God fathered the Davidic line of rulers in ancient Israel. Did Jehovah literally sire those men? I think it's not hard to see how the use of Father within the text is metaphorical.
We've been discussing this point for a little while now. I'm going to move on soon, but just wanted to provided a fuller description of my viewpoint.