I don't like the focus on Clara in this season. Last season it worked with Matt Smith as the Doctor, because he was so energetic that when there was focus on Clara, the Doctor still had plenty of presence. Capaldi is an interesting Doctor, but he lacks that sheer 'Look at me! I'm the Doctor!' acting Smith gave us, and with less of a presence Clara springs out a bit too much. Plus, while it was already starting to get obvious in the previous season, it's just straight up in my face how much of a Mary Sue Clara is. She feels like the perfect character with the non-flaw being that she has a normal life as well.
Don't get me wrong, I still quite like Dr. Who right now. But I'm not as excited to catch the newest episode any more, simply because of bad writing of the two main characters and half the time also because of the bad/boring plot.
So far, for me this season:
Deep breath was interesting, but had a really slow start. Into the Dalek I liked. Robot of Sherwood was too Clara-focused for my liking. Listen's ending was stupid to me (cmon, really? Clara once -again- just happened to influence the Doctor's past? That's not deep imo. That's a cop-out.) And though I loved Time Heist, the trailer I've seen for The Caretaker looks 'Meh' as hell with it's Clara-focused romance plot. (haven't seen the episode just yet.)
In my opinion we need more Doctor taking charge and companion helping, and less companion gets dragged out of normal life, after which the Doctor helps the companion solve a problem.