Spoilers for S06 E04 following...

She felt unappreciated. I suppose she understands Bran is devoid of emotion now BUT but I can't believe D & D just let her walk off our TV screens just like that. She took care of Bran for God knows how many seasons, pushed him around (that had be heavy in the snow and ice), watched her brother sacrifise himself and she just walks out the door? They cd ay least have given us a 10 second shot of her walking away from Winterfell; a goodbye of sorts for the fans s. Unless it's not the last time we see her.