But by the conclusion we know who the woman is. We never learnt anything that she might know that would make people hate Ruby.

The more I think about it, the more annoyed I am. The very specific 73 yards. The ability to teleport. The repeated gestures. The inability to see her face. Her power of suggestion. Even the clothes she was wearing. It was all set up to create a creepy and mysterious stalker. But in the end none of it was paid off.