While everyone is playing the countries from the new expansion, I finally got the hang of the Soviet Union vs Germany:
This game turned out pretty weird. I don't know if it's because of the expansion or because I won over Spain to the Comintern. First, for some reason the Allies didn't take off as a faction. Instead, the Little Entante which started with Poland and Romania gradually added Czhechoslovakia, Yugoslavia, Britain and France. Hungary on the other hand chose to join Japan in the Asian cooperation sphere. Germany took a long while to eat up Poland, but in the end returned Eastern Poland back to me, as per the Molotov-Ribbentrop pact. Then they quickly dealt with Czechoslovakia, Yugoslavia and Romania, and then finally turned to France, but it was already the summer of 1941. I thought, the AI wouldn't be so stupid as to DoW me in the autumn, but it did, in September 41. By that time however I had so many division massed at the borders and also lvl 2 bunkers in each border tile, that the Germans didn't advance anywhere. They just DoW'd me and stood there. It appears the AI didn't like its chances anywhere along the front.
At this point I had about 26 Tank divisions. I moved the 12 under Zhukov from Odessa to the Carpathians, and easily took the two tiles wide corridor which was connecting conquered Poland with the conquered Romania. This put 33 German divisions out of direct connection with Berlin and trapped in Romania. I had to wait for my final batch of 14 Tank divisions to be ready in Kiev in mid-November, swung them to Odessa in place of Zhukov's divisions, and began a sweeping operation along the Danube valley. Pretty easy.
I developed three templates for infantry - the game's default Rifle Division, but improved (11 Inf battalions, Support Artillery, Engineers), The Defensive Infantry (14 infantry battalions, 1 towed anti-tank battalion, support artillery, support engineers, support armored recon), and the Far East Rifle Division (11 Infantry, 1 Towed Artillery, Support Artillery, Support Engineers, Support Armored Recon). My Tank Divisions are 6 Medium Tank battalions, 8 Motorized Infantry battalions, Engineers, Maintenance, Armored Recon.
I reached the historical size of my order of battle - 150-160 infantry divisions of all kinds (the Russians converted their motorized and cavalry divisions into infantry divisions in the first months, most of them were severely lacking equipment anyway), ~40 Tank divisions.
Due to Hungary not being part of the war I've got the Germans pretty well boxed in in Romania and they are going to lose 33 divisions there. I've also made one not bad encirclement around Brest-Litovsk. This should pretty much cripple them.
Finally, I devised on my own a way to get to T-34 tanks early. I rush for medium tanks, regardless of time penalty, so that I am already researching T-28 by the time Germany offers me the tech cooperation. This allows me to research T-34 with a reduced penalty and have it researched by January 1938. By then I already had two small production lines going, just in order to develop their production efficiency, and in 1938 simply switched them to T-34s. By 1941 I had produced 6000 T-34s which was enough to equip 15 divisions (8 battalions x 50 tanks x 15 divisions), all while gradually updating my pre-existing 12 divisions to T-34. The final 14 divisions which you see on the Southern front (The red stars on fronts are my tank divisions) got made a little later, in November 41.
As I said, this game turned out pretty weird although I set Historical focuses for AIs to "On". At some point I took a look at France and saw something called "French Commune" carved out in the middle of the country. It turned out to be a Republican Spain's puppet. Commendable, although I'm not sure if some deaths by firing squad aren't in order, on account of a suspiciously eager initiative. In the bottom left corner you can see Spain has quickly opened a second front in Central Italy right next to Rome. Not like those anglo-pussies who waited for 1944, right?