For all of Moffat's faults, and I'll admit he had his fair share (but I don't necessarily agree with the number or the extremeness), he did give me my third favorite Doctor (Eleventh) and two of my favorite companions ever (Amy and Rory). His tenure produced some of the best individual stories ever (at least since the show returned) such as "The Doctor's Wife," "The God Complex," "The Girl Who Waited," "Vincent and the Doctor," "A Christmas Carol," and "Last Christmas" (among many others and your mileage may vary). His biggest problem was his story arcs.
Honestly, I kind of hope Chris Chibnall avoids story arcs for the most part. Of course, there should be character arcs for The Doctor and her companions, but do we really need these great sweeping story arcs that both Davies and Moffat gave us? Less is more and I would love to see the show go back to "simpler" times of the classic run (aside from the Cartmel Master Plan).
I completely agree about those of episodes, and if I squint just right, I'm able to pretend those are their actual exit episodes. Also helps that not only were those two episodes great exits for those companions, but they were great stories unto themselves. It's a shame Moffat doesn't know how to let go because that really hurts his writing. Same thing has happened for Bill twofold: Not only not allowing her to keep her tragic ending as a Cyberwoman, but after she was magically fixed from that state, she''s going to return for "Twice Upon a Time." Granted, Davies had the same problem (aside from Donna).