it honestly doesn't bother me because i think the transformation in this aspect was more like Rogue Storm rather than Storm as you say consciously going into God Mod. In the Rogue storm story Storm was trapped in living chronium and her subconscious was able to run rampant and thus her powers transform her into a violent version of herself. One where he consciousness was not in control at all. Which was evident in that she had to snap out of it and then calm the storm before denying her own power. In this case there was more of a balance in that Storm was hearing the voice of her Goddess mode, meaning she is now aware of what is there whether she consciously realises it or not. The fungus though was drawing that subconscious part of her out while her conscious part was awake so as you said instead of just straight destroying things and relishing in the elements like Rogue Storm, this God Storm was more like ororo in that it was aware of the situation and what Shuri was doing and created the chaos so Shuri could fix things. Another big difference is Storm didn't remember what happened so it says to me this is Storm and just different aspects of her as oppose to Dark Phoenix where Jean was influenced by an outside entity that brought out her base desires. Basically our girl has to start releasing that grip on her emotions and start to control them properly. cause she is repressed.