Seems like they didn't have an idea of what to do with the character, who was suppose to be originally on for a couple of episodes in season 1.
Interesting thing is it's only March 1983. It seemed like when the show referred to Brezhnev's death, it was a long time ago so I thought it was later in time.
Brezhnev died in NOvember 1982 so Andropov was in power.
If Nina was going to get leniency, she would have had better chance under Gorbachev but he wouldn't take over until March 1985.
But more interestingly, Philip and Elizabeth's lives would change radically under Gorby, assuming the show gets to that period.