@FMPoke You and I agree about what was going on with Ghost in last night's episode. I still don't think we will get much of Jon warging into Ghost, as it simply isn't that easy to do on TV (as opposed to the books, where you can actually see inside the mind of a character). I think HBO has gone out of their way to downplay the warging abilities of all characters not named Bran. His warging set the stage for what he is doing now that allows him to see the past.
What happens at The Wall, going forward, is going to be one of the most interesting aspects of the next 2-3 episodes. If I had made predictions prior to last night's episode, I would have said that the Wildlings and Nights Watch would have had an all out battle last night, leaving the Nights Watch pretty much extinct, the Wall undefended, and no reason for Jon to stick around. Either that, or Thorne would have turned the majority of the Watch against Snow and there would be no way he could stick around at The Wall. However, with Thorne (and company) imprisoned, and there still being a significant contingent of Crows at Castle Black, it seems like they will need Jon to lead them. He is no longer tied to the Night's Watch (at least not by oath), but it will be interesting to see what convinces him to leave the Wall and take his Wildling army south...which I am sure will happen. You may be right about the Crows feeling like he can't be trusted after returning from death.
When he leaves, I am wondering who will be the Lord Commander. Maybe Dolorous Ed? He won't be able to accompany Jon to the south without breaking his vows.