Straight Edge Saviour
The North Remembers what it wants. These bannermen haven't really exemplified loyalty so their bickering isn't really surprising to me. Though TBH I've kinda hated the whole Winterfell storyline this season. Arya has been a capital-B Bitch IMO. She should get back to her list and stop coming for Sansa so I can go back to liking her.
Speaking of stupid writing, to be honest it feels like the writers are lost without GRRM to guide their ship. Especially after the last two episodes, it feels like they have no idea what to do without characters being incredibly stupid in their actions in order to create drama. Ayra and Sansa, as you said, and this "catch a wight" storyline makes no sense.