I don't want Jon and Sansa feuding because I think that would entirely be drama borne of misunderstanding, and that's the most boring sort of drama. Instead it should be about Sansa becoming a true player in the Game, and Jon not wanting to be part of all that. It doesn't have to be a feud, or jealousy, or misunderstandings, it can just be him wanting to be the stubborn hero leader fighting the fantasy zombies, while she wants to be the one second guessing everyone, out thinking Littlefinger, etc, so they can have their differences that way. But in the end, I want to see her win, I want to see Littlefinger outmaneuvered, and in his desperation he tries a violent tactic to destroy Sansa, and that's when Jon comes in.
That way he can can get owned by both siblings, they can both get what they want, and the audience is satisfied without being put through annoying soap opera stuff.