The Vale is still a pretty intact force. The Tullys weren't wiped either, and her garbage uncle is now free from whatever vow to the Freys and Jaime can free him from vows to the Lannisters.
Yeah I didn't mean to minimalize the force, just Sansas impact in the overall. I think she'll be much more of a background player than anything, that's all. Won't mean the impact isn't there, but it will be more subdued.