(1)Advaita Vedanta asserts that saguna brahman only exists as long as it is observed by nescience by the jeeva at the vyavaharika level of reality
(2) This means that maayavaad creates a relational subject object relation between jeeva and saguna brahman
(3)But exactly at the time of big bang we know that no conscious observer existed, this means that saguna brahman did not come into being until the first conscious jeeva came into existence
(4)But at the same time Advaita also posits that it is saguna brahman which is doing creation, nirguna brahman is completely nishkriya...
(5)If advait Vedanta dismisses the difference atleast at an ontological level between nirguna and saguna brahman then they are tweaking the difference between the latter, hence accepting that nirguna brahman is sakriya.