I have to Disagree with you here. I don't think it was her Subconscious. I think Storm in a sense was aware, because she wouldn't have told Shuri - "Go back to the source and handle yourself, Princess of Wakanda". Clearly, she knows what's going on and helped her in the situation at hand because Shuri understood what Goddess Storm meant by her words. Storm has already embraced this new found power she tells Ikoko in Shuri #2: "Did you forget I am a Goddess". The Fungus in that cave as Shuri says has different effects on people and in Storm's case it brought out Goddess Storm. This instance is only a contradiction between how Goddess Storm was in BP #172 as opposed to here in Shuri #9.