ORIGINAL: daft
I think my "perfect" war game would be a real-time game where you could essentially start as a company commander and work you way up from there. Being a small cog in a massive machinery controlled by the AI. And if you start or work your wayup all the way to the top, AI is there support your ideas and execute your plans, leaving you to focus on the battle plan.
Crusader Kings II is just that: start as a Count involved in petty regional squabbles, become an Emperor down the line (your lineage) focusing on whole continents - while your subjects squabble about a handkerchief of land. You can even save the game, reload it and start again at the bottom by choosing one of your subjects - or e en someone else’s.
Of course CKII is set in the Middle Ages, but the framework is there: you do occupy a position and the AI manages every other character above and below you.
Re: Road to Moscow, I agree that it was too ambitious for the times. But Command Ops applied the same principles on a tactical level already back in the early 2000s. Maybe now it could be done - starting today with a 2020-21 publishing aim.