Beautifully explained. I do agree with the show being rushed and that is the very reason most feel a bit cheated. I suppose it is always risky making an unfinished story into a show. Once you actually manage to explain the ending to yourself in your head, it kind of makes sense - the oppressed and nearly destroyed family comes out as the winner and ends up on top of the food chain for both north and south of the wall. It's the kind of typical happy ending, details don't matter.