I had assumed that was just to give Egwene more of a reason to be with the guys, and to add even more mystery to who it is. Watched episode 2 today, and they passed me up now. I still enjoyed it, but I was a little surprised they skipped over the Draghkar and Moiraine creating the mist, I figured such a visual and exciting moment would make it into the show. I guess they must have just decided to have the Trollocs right on their heels instead. I was just looking on the Wheel of Time Wiki, and I saw that they have Moiraine under "more characters" instead of "main characters", so does that mean she doesn't play a big role in the rest of the series beyond Eye of the World?