You weren't the only person who did it after not having done the CT storyline in years and yet many remembered who the Exarch was. Course there are many who like you who didn't. I'm sorry you didn't enjoy the 2nd most highly praised by fans and critics alike expansion. I'm a little baffled that you got confused about the auracite part in that it's too porous of a thing that it would be like a water balloon with a very small hole. Where over a small amount of time one's aether would just leak out which isn't what you'd want when traveling the rift. Instead of bringing up the whole oh crap we labeled Umbral and Astral wrong bit.