First of all great last episode!
Second: I think Marie's line on the phone is the story tellers way of setting up a way for Walt to show his brilliance: "He think's he is some kind of criminal mastermind". By succeeding with his plan, Walt pretty much confirms this.
I also appreciate the scene with Skyler where Walt admits both to himself and to Skyler that he has been egoistic during this whole thing. I don't see this as an indication that Walt love his family any less though. Walt clearly loves his family very much, but where he earlier thought he was doing it all for his family, he has come to realize he also did it because it made him feel alive.
And about Walt saving Jesse. All indications points towards Walt understanding the situation before going out there and executing his plan. I can't prove it of course, but the way Walt seems to "play" Jack to bring Jesse in to the building makes me think he understood the situation. He suspected Jesse was alive and he knew Jesse wouldn't willingly work for Tod. Either Jesse was being held as a slave, or Jesse had taught Tod well enough to make the blue meth himself. I would find it highly unlikely for Walt to go to Jack without considering what to do if Jesse was being held hostage.
This last episode takes Walt from being a man that thinks he is doing it all for his family (Might have unerstood this already before makes his call to Skyler as he leaves town a couple of episodes ago), to realize he is also doing it for himself and how it makes him feel. He also shows us that he no longer care for excessive money by not even bothering to listen to Jack on his deathbed. Walt has already ensured more than enough money for Jr. and that is all he wants, because he is now aware of his egoistic motive for trying to make more and more money earlier on in the series.
I also like the parting scene between Walt and Jesse, as it almost seems like they both forgive each other with that last one smile.