Sorry. She is a bit busy today.
WHO are you, Missy?
Do you think she was “busy” because she was mad that rather than destroy the whole planet, like it could have, the Blitzer only managed to take out one police officer that the Doctor didn’t even notice? Perhaps it’s not that she wants these people to die, but that maybe she just wants the Doctor to suffer and acknowledge the wake of careless destruction he leaves behind him?