While all true, I'd like to see her be a little bit more like her brothers and sister, not just being a tool used by everyone that comes to King's Landing. She's as well educated as the rest of the Starks, and while their family are certainly the least experienced to the backbiting of court, Sansa should be better than the rest of them at it by now. Certainly better than fumbling Robb, losing half his army by not being harsh enough the first time, then being too strong the next time.
Yet she still believes whoever smiles at her...
It's hard watching her get emotionally destroyed each season. Everyone else fights against what fate has dealt them, Sansa just lets it all happen to her.