Interesting analysis. The fact that no one listened to her was because no one took her seriously, though. Sansa is the reason the wildlings and Jon are alive. Her decision not to tell them about the knights of the Vale was really the key to the whole thing. That far ahead thinking and planning suggested to me that shes already on the way to becoming a ruler.I think she's gone from stary-eyed princess wannabe to a realist. But ruler? I disagree. I don't think she's ruled much of anything.
Jon led the army to retake Winterfell. In the war planning meeting nobody even asked for Sansa's opinion. The Wildings are loyal to Jon and nobody else, because he saved them. The Houses of the North declared Jon as King of the North.
She doesn't seem to be aspiring to rule, either. On the wall at Winterfell, she said Jon should have their parent's room, a symbolic gesture for his lordship and not hers.
Perhaps she will rule in the future. Littlefinger seems to have plans for her to rule the North, or at least that's what he tells her. But for right now? Right now she's buried pretty deep in Jon's enormous shadow.
As much as I love Jon, his whole battle was riddled with mistakes right from the beginning. He can inspire of course, but Sansa did all of the thinking in this case.