That's how I rate this current season: Meh.
The "story arc", if you want to call it that, wasn't exactly thrilling. During every single episode I was hoping they'd just go ahead and "regenerate" him. Capaldi and Coleman are good actors however I think the writing this season has been positively atrocious and I have very little expectations for the Christmas episode.
This season has simply meandered all over the place. Pulling book characters like Robin Hood and tying that to concepts of Heaven had the possibility of saying that this Dr has moved into some weird alternate universe timeline based on fairy tales... Kind of like the reveal around the crack in the universe and Amy. Yet, this hasn't materialized.
The draw to the Dr. Who reboot is that it is smart and funny along with presenting solid ethical dilemmas intelligently with the Dr leading the way. This entire season felt as if he was just a little raft on a big ocean being thrown about with little ability to direct things no matter how much running around he's done or pretty speeches he might give.
The Oswald character had a tremendous amount going for her. Although I really believe that she should have exited as soon as she stepped into the Dr.'s time stream. Everything that's happened since then just doesn't make any real sense. What could she have possibly wanted to tell Danny that was so important that she didn't want to tell him to his face? And, no, I don't buy that a woman would NOT want to see a man's face when she told him she was pregnant so it wasn't that.
All in all, this season of Who feels like the authors are trying to be smarter than they really are and are utterly failing in the process.