Some folks are dismissing the show as part of the media love affair with the commies, and it probably is. Still, I could see a practical reason to have the main characters be Russians in the US. If you tried to reverse that, with American sleeper agents in Russia, nobody would want to watch it. We don’t understand or care about Russian culture for the most part, and Soviet Russia would be a pretty drab backdrop for a series.
A program about the coordination between the Reagan Administration, The Vatican, and persons in Poland would make for more interesting fare. And you'd be watching these people under an oppressive dictatorship working covertly to cast off the chains of Communism, ultimately bringing down the Evil Empire. Russia may be drab, but there is something in such a proposed extended ongoing series. Motivational even.
I watched it last night and it didn’t appear to glorify the commies at all, not on the pilot at least. One scene showed the husband trying to talk his wife into defecting, saying that life was good over here, not like the lies told to them by KGB, and people didn’t have to stand in line for food. Of course that doesn’t mean the show won’t turn into a Reagan bashing as it progresses.