Glad you will be updating.
I just thought of two things I think need to be brought up.
Famine.
I think the Soviet Union is headed for its worst famine since World War II.
ITTL, Russia couldn't feed itself, and now a civil war is breaking out.
In war, especially in the modern era, hunger and disease can be a bigger killer than guns. I think the problems of famine have less to do with overpopulation than a lack of infrastructure to distribute resources, bad planning, political violence, and corruption
Even if wealthy nations feel obligated to send aid, OTL a lot of aid can be stolen.
By the winter of 67-68, probably tens of thousands are going to die of famine. Unless Fyodor Kulakov isn't drunk on cool aid, the areas still controlled by the Soviets are going to be littered with the bodies of the starved.
Unless the rebels can hash out some kind of farming reform, they'll be dealing with the same problem.
***
The other issue is the status of the Soviet Jews.
Since the rebels now control Siberia, I think one their first actions will be to release the Jews from those settlements.
The rebels will be motivated both by conscience and by a desire to score points with the West.
But I think what could happen, once they come across the free settlements, is these hardened rebels may see these emaciated, hopeless individuals behind barbed wire fences, and they'll breakdown in tears.
Sure, some of them already have read the Yellow Star through samizdat and have an intellectual idea of the horrors the Jews faced, but for those who remember World War II, and remember the sickly faces in the concentration camps, and seeing those sickly faces again only in their own country, it would be too much to bear. I imagine that World War II vets elsewhere, from England to Poland seeing the same crimes they fought against, and those horrible faces, again in Europe for the second time, would be like a knife to heart.
I remember reading about how the OTL breakup of Yugoslavia horrified Europeans because it brought back the barbed wire concentration camps of World War II. Well, the generation that fought it may collectively unleashed a sob of despair at it happening again.
"We approached the barbed wire fence. Staring at us were the living remains of what were once human beings. They looked at us, not with the hope of the liberated, as we assumed, but with the hopeless glaze of one condemned. Some of us, staring at these pitiful creatures, wept. Some of us cursed Stalin, his pet sycophants, and ourselves for our betrayals. One soldier, Vasily Kruchov, believed his time in Kolyma would brace him for these horrors. However, Vasily forgot that in the Gulag, one must avoid the suffering of others to remember your own. Vasily tears became the most bitter, as for the first time, he was forced to absorb the pain of others. But the greatest pain was that the sufferers didn't wept. They had long forgotten to shed tears. Our anguish was small compared to the horrors these soulless husks endured.
Ivan Stravinov, The Red Front, 1978.