[IanJRedman]

The best character to come out of Jodie Whittaker's tenure is the latest Master, as portrayed by the excellent Sacha Dhawan.

It's not supposed to be a likeable character, but he even managed to improve on the previous great performances of John Simm and Michelle Gomez, to the point where I actually cheered his appearances more than those of the Doctor. 

I think the problem going forward from the Chris Chibnall era is that too much of the backstory has been re-written. Unless they somehow manage to manufacture a "Bobby steps out of the shower, and it was all a dream" moment, then the tinkering may have gone too far. 

RTD is an excellent writer, so I'm sure he'll rescue it somehow.

To be honest, I'm not personally sure the backstory even matters that much. Going forward, if the stories are compelling, then who the character is or where they came from shouldn't really make any difference. I'm by no means against the changes Chibnall introduced (in fact, you could argue that the Doctor's origins are more ambiguous now than they were previously) but there's certainly precedent for these things being introduced and ultimately fading into history without being mentioned again. (eg the 1996 TV Movie would have you believe the Doctor is half-human!)