Hey! I've been playing this mod for a while and I agree with earlier sentiments here that Soviets are completely OP in vanilla difficulty. They are far too powerful even with an extremely efficient / successful Germany and a well-planned Barbarossa.
As you can see from these pictures, it's September 1941 and the Wehrmacht (me) is already screwed. Even as I have subdued all of Europe, bringing every nation in Europe except Sweden and Ireland under my domination, it's still not even close to matching the Russians. Currently I'm pitting Germany's 160 divisions + the entirety of Europe's fascist armies agaisnt the Reds and I can only muster a total of ~300 divisions for the destruction of communism, even under optimal circumstances. I took manual control of every single country in the Axis, excluding Norway and recently conquered England and threw their entire weight at Russia, going as far as leaving no divisions to guard the coastline. I launched Barbarossa on may 5, 1941. Finland joined the war in June 1941 but was defeated within just one month. The entirety of the Axis airforce is just barely larger than the Soviet airforce, even after catastrophic Russian losses during the first couple of months. Russians outnumber the entire Axis by 150 divisions in 1941, even after I destroyed some 80 divisions in my initial push. Soviet infantry, because of their buffs get jacked on ORG, making them equivilent to German troops even at this early stage.
I have a "ram" of 40 motorized/tank divisions that can sometimes punch through the Soviet lines, but because of their numbers and the autistic AI, everywhere you punch through there is 3 layers of provinces with 20 enemy divisions in each. Russians are already using 1943 Kursk tactics to blunt Blitzkrieg. Unless your "ram" can defeat their troops within a few hours the AI rushes ~40 divisions to the breach, making further progress impossible. Even if you are successful in an encirclement like in the bottom picture, the sheer weight of the Soviet army (there is 33 divisions counter-attacking my holding force of just 6 from the south), you have no way of following up on the encirclements because 1) the Soviets counter-attack every province with a spam of motor divisions and cut off your spearhead within a day or two, 2) static ORG regain means that even if you DO manage to complete an encirclement it's virtually impossible to destroy the encircled divisions before a counter-attack swarms you. 3), the Germans get a static penalty to Barbarossa troops from the "logistical challenges" event. 4) the Bolshevik airforce is so strong that they have complete air superiority from day 1, causing their CAS to constantly drain the ORG of your recovering armies, making it even harder to advance.
All in all, by September 1941, even after having destroyed 4 million Soviet troops in the initial push, they still retain a 50% larger army than the totality of the Axis combined and outproduce them 2:1. Soviets have 770 IC to Germany's 410. Even if I bait the AI into attacking only to counter-attack and encircle a few divisions, they produce units faster than you could conceivably destroy them. That is if i COULD attack, but my motorized divisions are thorougly tied down as the Soviets are constantly attacking with 30 divisions all along the front vs my average of 12-15 holding it, forcing me to race up and down the front to re-enforce and leaving me no room for further advance. And America with its ridicilous 1200 IC hasn't even entered the war yet.
I think it's clear that some tweaking needs to be done.