First HORN - God seems Impotent, There is some other reason that things are good, God does not define the rules he just reads them to us, God cannot do everything he is constrained by rules of morality outside of his control, God is not requires for morality, there is something that God did not create, If the rules of morality dictated that God must act a certain way he is POWERLESS to disobey
If you go for the first horn, God’s omnipotence seems limited. Morality is possible without God. God is not the creator, just a transcriber.