I have to say Shana (Pettyjohn) came off as 'stupid' not brainwashed, uninformed, uneducated, unenlightened as she was meant to be.
The actors who had to play unnatural accents (Irina) seemed to fair poorly as it seemed they were concentrating on their accent more than their performance.
Something about 'Sylvia' did strike me as bad--maybe acting, maybe lines as written.