I didn't mind Teddy going, that really upped the ante of how nasty Roper really is, but killing off Burr just didn't make sense.
Angela Burr was a massively driven character and wasn't an idiot. Far from it. When the airdrop went wrong and she was in the Library with Mayra.. and Mayra walked out, there is no way she would have just gone home to France. Not with what happened in series 1 with Roper nor with Mayhew. Maybe she would have leaked everything to the press, or found a way with the CIA again to help, or gotten in touch with people she knew in the River house since she was completely vindicated in her persuit of Roper before.
I supose she had her family there and maybe went back but she was an organised operative in the past.. she would have known there was a risk so would have had an out for them planned.
They could have/ should have done more with her than just kill her off in a lazy shock and I think her character deserved to survive to the end.