http://www.radiotimes.com/news/2016-03-07/peter-capaldi-ive-been-asked-to-stay-on-in-doctor-who-after-steven-moffat-leaves

"I have to make up my mind, and I haven’t yet,” says Capaldi.

he needs to stay - too much upheaval already, we still don't even have a new companion yet, and I haven't even gotten over losing Amy Pond yet !

http://www.digitalspy.com/tv/doctor-who/news/a786448/peter-capaldi-says-steven-moffat-had-to-quit-doctor-who-otherwise-he-might-have-had-a-heart-attack/

"He's an astonishing talent, but he's a human being, and I don't think he can continue working at this rate,” Capaldi tells Newsweek. "The cost of doing Doctor Who to an individual is immense. He takes the greatest weight on his shoulders, he loves the show and he's absolutely responsible for it and feels that responsibility gravely - and with delight as well.”

I don't get it - they only make like 6 episodes per year now, and apparently they are taking a year and a half off - so if they are feeling too over worked by this, maybe they need to quit one of their OTHER jobs