I'm looking forward to seeing what they do with The Master here. I'm hoping he gets a decent arc and not just the couple of episodes he usually gets. Missy was very underutilized.
Really? The Master is becoming up there with the Daleks and Cybermen for 'I couldn't be bothered this week' episode writing. Missy was a blatant softening up for a female Doctor, so her stories were secondary (and poor in general). If they want a Time Lord adversary then lots of old time fans would like The Rani, rather than the Master(/Mistress) version 85.