The story line between Sansa and Arya seemed somewhat unbelievable, like they cut out scenes that would have tied it all together. But the rest on the season was incredible!
Agreed, I wish they had expanded on Littlefinger's arc/motives a bit more. It all seemed very abrupt.
Ya, it was kind of hard to see his end game, since he was obsessed with the Starks, but not necessarily benefiting them all the time?