Well they said it's like an overall setting. The aura doesn't have a switch on and off button for each and every aura; Darkside, Defiance, Greased Lightning. They just have one big switch for that.

They said if we switch off teh Darkside Aura, we won't see our Greased Lightning and Defiance. They're looking into it to implement a switch for Darkside Aura only.

I suspect this is more of an engine limitation rather than codes or just little thing.