There are pros and cons to it, part of the problem the Empire had IOTL was that there were so many personal fiefdoms in the military bureaucracy that they could act without any effective control by the central government.
Has the 2nd Italo-Ethiopian war seen more volunteers than OTL, or other notable differences?
Unfortunately, it's logistically impossible. Ethiopia is landlocked, and all the access points to the country are effectively closed. They either belong to Italy itself, or are part of the British and French colonial empires, who aren't going to let foreign soldiers pass through to aid Ethiopia. Additionally, the infrastructure and terrain are very rough.
By what methods is this systematic disenfranchisement of "counterrevolutionaries and class enemies" done?
Political disenfranchisement. Declassed members of the bourgeoisie and people who had been part of counterrevolutionary groups in the civil war lose their right to vote, to serve on juries, run for public office, etc. The small numbers of privately held businesses face a similar revocation. You can get it back, but you basically have to demonstrate that you're sufficiently zealous for the cause .
In OTL Molotob Cocktains were called that in reference to the non-existent 'bread' Molotov claimed the Soviets were dropping over Finland. Is there a similar etymology in TTL?
Yes, in one of his few public statements, General Sanjurjo dismisses reports of the Condor Legion bombing civilian areas by dismissing it as communist propaganda, that they were actually relief packages.
Further butterflies thanks to Tan Malaka's greater involvement in the uprisings? Was he in Boven Digoel, or the less repressive reprisal just sees him going underground? Also, seems like DEI communist are aligning closer than OTL w/nationalist
They were until this point. This does drive a wedge between nationalists and communists.
Iosif the sneaky fucker, his power grab has already started. Wonder if there's something United Republics can do about that. The Americans being pretty openly negative of Soviet bureaucratic deformation already.
It will not be known for some time just how extensive the Yezhovischina is. The prominent trials will result in criticism, but the levers turning behind the scene will be known only to American intelligence and the highest levels of government, and they will be largely complicit in keeping the information suppressed for some time.
Right-KMT's efforts to poach Jiang from Left KMT-CCP alliance could possibly erase the gains compared to OTL, by increasing the United Front's disunity.
China also never experienced the same level of investment from British, French and German capital TTL. There's no real "Nanjing decade", a more modest expansion driven post 1933 by American and Soviet capital is occurring, so take that into account. The warlord problem is a bit better under control, but it's far from over.
Who wants to bet that this universes' Lord of the Rings will include a Sauron being part of a Team-Up of Evil with some kind of western continent dwelling immortal witch/succubus/demon seductress/evil she-Maia, with both them being Morgoth's old lieutenants?
And that the actual Good Guys Powers (the Valar) won't be "from the hidden True West of Flatearth Arda" but "from the Stars"?
Tolkien detested allegory, and he didn't really view industrial capitalism as any different in principle from Soviet "state socialism". He was a medievalist at heart, and that is woven into all of his work set in Middle Earth. We've been treating his work as largely unchanged in any major details.
More questions, troika:
1. Does HIV/AIDS exist ITTL?
2. This is the year 2019 of Our Lord. Has male birth control been available ITTL? If yes, how did it come about?
3. Based on the way UASR citizens approach sex and treat sex workers, is "Girlfriend Experience" or "traveling companion" a thing among sex workers in UASR?
1. HIV still exists, but the nature of its spread is still undetermined.
2. It's unlikely to be any more advanced than IOTL. The biomedical issues with male birth control are more complicated, and it's widely seen as just simpler to promote barrier contraceptives because they also prevent the spread of venereal diseases.
3. Given the going rate that those sorts of services have, it's unlikely to be common in the formal market. That said, there will probably be plenty of people of both sexes who enter into casual relationships with older and more economically successful people because they take them travelling, give them stuff, etc.