Tbf, in the books Sansa has a pretty consistent growth arc so far. Its only in the show where they go backwards and put her back into torture situations with Ramsay. Since Ramsay marries and tortures another charachter in the books, we know thats not happening there.

I also dont think Sansa's much of an "archetype subversion". Innocent naive girl who goes through abuse, but then learns to be shrewd and "play the game" is her arc. I never saw her story in the books as unnecessary torture porn. I dont even think most of it is on page or described in the books? Putting her through it on screen is more of a show thing, again.