User blog comment:Hidden Scorpius XI/Kneejerk reaction to "Raven Branwen"/@comment-25396609-20150825003340

This is a fledgling series with writers who are still finding a groove for the show, of course there's going to be blatantly obvious plot twists.

Another possibility also exists, in that her identity was not intended as a plot twist, but as a dramatic initial apearance, with the true plot twist being the why rather than the who.