You're missing the part where almost everything went far better than could ever be hoped for and the Soviets were extraordinarily incompetent. There's a point at which the front is too wide and the supply lines too long - this was reached in OTL. I don't see how you could realistically make Barbarossa go any better without resorting to Notzis or the classic "Nazis attempt a different strategy but their opponents for some reason act exactly as they did OTL."
Also, let's ignore everything I just said and presume the Wehrmacht closes the Kiev pocket then proceeds to somehow get its exhausted beyond exhausted divisions into Moscow. Great, now they get to fight Stalingrad-style urban warfare a year early - block by block, street by street, building by building, room by room. You think they can sustain this sort of combat and win? They don't even have the capability to get winter uniforms to the front at this point in time.
And now that the RAF is unoccupied the UK just sits there doing nothing?