It seems so, they are the ones who started inventing things and then they r too lazy to wrap it up. No wonder Sansa always felt off for me, it was their move. I guess their excuse was "thats not good TV George, we know whats good TV".
In fact, even the actress herself has made comment about how silly that is.
Yes, in the back of the scenes of the slaughter episode she says something like "they want me to appear dead for second and then recover, but the audience is too smart for that..." she also appears with a very insecure posture.
The writers also actually say they wanted her there only so you would care more for that scene, not for plot. They just thought of "cool scenes" not the story as a whole, leaving this mess behind.
I mean, it's possible to enjoy a show but still acknowledge the writing is bad, lacking, etc. One of my favorite movies is The Room. That movie is bad at a level beyond human comprehension. It was made by an alien after all.
The thing is we spected something deep but we got something empty just for easy entertaiment and laziness, I guess I also blame cocain for their inflated ego.
One thing is if you start watching something you know is bad just out of curiosity or fun or because some aspects of it you like, another is to have quality that turns to emptiness in the end.