Theistic consubstantialism and omniscience

According to theistic consubstantialism, the universe and God are essentially made of the same stuff. If theistic consubstantialism is correct, then God possesses the essential power to have knowledge de se of the contents of the mind of every conscious being internal to God. If theistic consubstantialism is false, then God lacks this essential property. So either God is essentially corporeal and possesses greater essential epistemic powers than God would have otherwise or God is essentially incorporeal and has a diminished range of essential epistemic powers. In light of this dilemma, I argue that theists should accept theistic consubstantialism.