I'd honestly given so much thought to the Blasted Land stuff that I didn't think much about the large sections of the realm that are "civilized" or at least mostly intact.
I find it a little hard to mentally detach the James Cameron bits from '90s Los Angeles in my mind's eye as I try to visualize the urban parts of Tharkold. The big shiny skyscrapers and shadowy alleys, big orange sunsets, dusty reservoirs - you know, Cameron stuff. Its not that there cannot be compelling replacements to be found, I just don't quite know what they are yet. Like, Metro 2033 and STALKER and Mad Max give plenty of examples of the feel of the Blasted Land, but are there East European techno-horror things for reference for the city-states? Is Geiger a big reference point, as the stela image suggests?
I do wonder what demon-occupied Russia feels like, day-to-day for most people. Is it akin to the weird "alien overlord" setting of Half-Life 2, all military checkpoints and reminders who(m?) you serve? If the Barker-y and Terminator-y things are still present, those oligarchs are gonna be into some gnarly shit behind closed doors. I worry a bit about seeing Too Many Tharkoldu making them seem a bit disposable, but I can see why you'd want them to be front and center for adventures as adversaries.
Speaking of which, I'm sure this is being covered, but I do hope they have some wild minions in addition to the Thralls, Ghuls and drones. With the Russian government complicit in their rule, I imagined they share resources and forces - Hind helicopters flying escort for Thrall patrols, satellite imagery guiding warlords vying for territory not claimed by their rivals....
And, listen, I like "ex-FSB Bratva bad guys" as much as anybody, but I'd like to get to know the broader demographic of Russia's people that Americans like me honestly don't know much at all. It needn't be a detailed study or anything - enough to give the flavor and feel a little more nuanced than the generic stereotypes.