Same as Devo. As much as i wanted to like Orwell, the dialogs always seems to be "out of context" and had not much impact on me. I'd like to know more about her backstory but the few hints we've had were not enough to make Orwell an unforgettable charecter like River Tam or Cameron. You can also find me on Twitter, Facebook, Tumblr or Youtube
you're right I would see River and Cameron as Summers 2 big characters and Orwell sadly never got the chance become her 3th big character. You can't stop the signal!