Sorry for the lack of recent updates, I'm wrapping up my MA (which has involved a surprising amount of travel) so the TL isn't even on the back-burner right now. It's not cancelled, I just figured I'd just let you know not to expect an update any earlier than November.
Hitler dying is largely a consequence of the PoD and the way the ripples hit Europe. Some on this thread had been noting it as a possible, if not likely, consequence for years now. The civil war is somewhat more a case of author fiat, I wanted to write a "realistic" (ie early and limited) Nazi civil war because I find the Nazi Victory = apocalyptic civil war trope to be extremely tiresome.
Alternatively we might speculate a little further ahead. Who else is wanked the most by there being no WWII?
Britain? Well they aren't getting dragged into a far more costly war closer to home.
The Soviets? They aren't being gutted by Barbarossa for the foreseeable future.
Germany? The civil war will suck, but cancelling their national suicide and subsequent partition would be one hell of a trade off, especially if the civil war leaves their dominant economic position in central and southern Europe intact.
Well-justified, and as your life goes on, we're grateful for everything we've gotten so far, and for any prospect of continuation in the future, whenever that happens. Best of luck in your academic, employment, and personal endeavours! My apologies if I've been been over-opinionated or stirdent in any of my commentary on preferred/disfavored outcomes. Doing a great job.
On the "who gets wanked" without WWII? I would say, relative to OTL, all three you mention would get 'wanked' in an absolute sense of domestic welfare compared to OTL. The British probably the least. In a geopolitical reach sense, the Soviets don't appear to be getting wanked. But beyond the three powers mentioned, its other, smaller players that really get wanked compared to OTL -
Poland! Arguably Italy, not getting fought and picked over. France, not getting conquered and occupied.
European Jewry and Roma.
I agree with GrahamB on China unless the UK settles with Japan in a way that let's the Sino-Japanese fighting bleed on.