Im guessing theres simply not enough money to be made here anymore. RTS as a genre had shrunk quite rapidly since the golden age of early 2000s, and В тылу врага like games were always geared towards a niche crowd, so the potential audience is simply too small to support an AAA quality game.
Also 1C Publishing isnt doing well at the moment, they are barely doing any publishing work at all.
Last few years saw nothing other than some cheap King Bounty expandalones, some cheap MoWalikes, and constant re-releasing their back catalogue from 2002 to 2009.
I doubt they even have the financial power to fund a true AAA game project.
They even stopped backing their Stalkeresque Nuclear Union game(which was to be their first unique IP since forever) developed by Best Way, and afaik that put Best Way in quite a predicament, now they are trying to greenlight
Battle of Empires : 1914-1918 that looks like nothing more than a MoW modification, a desperate attempt at recouping from losses 1Cs Nuclear Union brought them.