Actually it was Simm (earlier Master) who said something along the lines of "We Time Lords are so old we are beyond that bullshit" which I knew was them attempting to virtue signal, but it actually came off making fun of themselves for giving so much of a shit about it. Second time they unintentionally mocked the agenda they were trying to push (other was when the roman bi dude made fun of Billy for being a prude for only banging one gender), but we know those people are so up their own asses that they don't realize when they have accidently wandered into self parody.
But yeah, a whole season of Missy under rehabilitation would have been fucking awesome, but instead we got the spotlight on some snaggle-pussed carpet muncher who speaks with such a cockney accent that I cannot understand her half the fucking time, and oh yeah she keeps reminding us how she is gay, black, and all that. Captain Jack never had to tell anyone he was into the wang, because it didn't fucking matter. If you want gay characters to be taken as normal and accepted, then stop shinning a fucking flood light on it every chance you get (Modern Family and Supergirl are also pretty fucking terrible about this). But mainly, we had Capaldi, who is a classic old man Doctor in the Pertwee/Hartnell/McCoy mold and an amazing actor. We had a great companion (Nardo) and an amazing foil for banter in Missy. But hey, lets spend a whole fucking year centered around some shitty acted and written walking stereotype, instead of the actual aliens in the science fiction show. And what makes it worse is that they did the exact same fucking thing wasting his first two seasons on Clara bullshit, which was WAY played out after the 50th special. Instead of doing something new, they did it again but worse in every way with an unrelatable character with an ugly as shit and untalented actress behind her. Clara was at least pretty to look at, if nothing else. Mackie has nothing and I would bet anything they brought Nardo in to cover up how useless she is, since he was a last second addition to this season. Fuck, the cyberman head from Smith's last episode was a better fucking companion. I think Mel is still worse, but Billy definitely passed up Perry on the all time worst companion list. And rumors were that she was also a pain in the ass to work with for both Capaldi and Gomez, so no wonder they are both walking after this season.
Capaldi (and we the fans) got robbed because BBC wanted to play the virtue signal game and/or focus on companions instead of the title character (again). It might have worked if they had made the lesbianism incidental and found a descent (or at least average looking) actress. Good black actresses do exist in Britain and are on other BBC shows (the cop chick in Dirk Gently even looks like an attractive version of Mackey but can actually act), but I think they are trying to tap into millennial audiences with who they picked instead (and that horrifically bad class show), instead of focusing on the writing.
But yeah I am guessing she wont be dead and will be the only person their from this season, come next year, given how committed to this current rabbit hole BBC is. I fully expect next season to include a gay muslim scientist in the middle ages who was about to cure cancer and launch a space program before white Christian crusaders overran his lab and stole his secret infoz, the way this show is headed.