Oh, I should state that I really liked the last episode, even though I agree that the final revelation is not much of a revelation. But I think that's the point - it's a reveal that adds more questions than it answers. Answering "who are you?" with "well, my parents are" is not very informative, and there's a lot that still needs to fill in.
What I did appreciate about the last story is the nature of the doctor's darkest hour. It's not his darkest hour because his plans go wrong. It's his darkest hour because he finally realizes that in order to win, he no longer has to try anymore. This is a theme that was played with a lot in the Tenth doctor years as well - especially towards the end - but I thought here it was done a lot better. This isn't about the doctor becoming too arrogant or powerful. He's been doing the right things. But even in doing so, he's doing a lot of harm. If this is going to go where I think it's going to go then I think it's going to be very cool. Maybe it won't satisfy the fans of the earlier doctors - I can't say, because I came to this game way too late to be part of that. But I think that, though far from perfect - and while somewhat less compelling than the previous season - I overall really like what this season is trying to do.