Hey here's some of my ideas for the 1933 scenario, sorry if people have already said them.
Germany in General: Start off with slightly more IC and less dissent, Germany didn't have more dissent than France or the USSR at the time.
Germany (communists):If you pick the communists in the Reich stag, your sliders should change to the USSR ones, full central planning and hawk for example as the USSR would immediately start influencing Germany. Upon the communists coming to power there should be an event which covers Hitlers death, probably a dissent hit as it would be a obvious move if the communists came to power, alternatively you could have a civil war but that might be a bit to hard to implement. Communist Germany needs more Generals, some events should be implemented such as purges of officers leaving some Nazi Generals defecting to the communist cause and some dying/leaving the country, maybe for other countries to serve as a general? Upon Germany become communist, core provinces in the west should still be present such as the claim on Alsace-Lorraine, countries in Europe should start joining the Allies, they wouldn't just sit and watch as two major powers become communist, for that reason I would have countries such as Belgium, Netherlands, Switzerland (breaking their neutrality) and Possibly Italy or even Japan start to join the Allies or at least all sign Anti Communist Pacts, providing blueprints and benefits to one another to compensate for the now very strong communists. There should be events handing over troops/airplanes to Germany from the USSR, to boost the German army. As for the Spread the revolution event, I would reduce its effectiveness and maybe add a chance to implement a Fascist government if the communist coup fails, due to people turning to Fascists and right wing extremists to solve the problem. When the war finally begins between the Communists and the Allies I would have many non aligned countries join the Allies as they would know of their fate if the Allies lost, this would balance the fact that the Allies would be versing two powerful major nations. Finally, add a possibly of an anschluss (might have miss pelt)with a communist Austria.
Germany (Nazis): If choosing Nazi's in the Reich stag dissent should significantly decrease, more so than with the communists, making it the obvious choice. Through the first few years of the game, Germany should be gifted tanks/airplanes depending on how much money they invest into Big industrial corporations to compensate for their lack of starting IC. The attempted coup in 1934 should have a chance of success or at least different options to take regarding it. Germany should be able to access events which return or might return core provinces from countries such as Belgium or Denmark, maybe even returning some colonies if played right. The building of the Bismark should be an event that consumes money and gives the ship much later on through event, that is if you choose to fund the production with money, this is to add flavor and also avoid having to put it in the production slider.
United Kingdom: Should be, from game start or at least close to the start, the possibility of a fascist take over, from Oswald Mosley, similar to Mussolini, this is more of an extra addition, an option the AI would generally not take. The UK needs to have less control on the commonwealth, they shouldn't be allowed to assume military command and swarm all the troops from the commonwealth into France upon the German declaration of war. The commonwealth should only commit some troops, not all, possibly from an event which gives Britain half of the commonwealth armies/air force/navy. United Kingdom should have the possibility to declare war on Germany if they have an anschluss or go over conscription laws from Versailles, this would be a massive dissent hit however. If Germany chose the communist route, Britain should have an event similar to spread the revolution which draws countries into the allies, Japan and Italy would be a nice edition to the allies if they chose to join.
France: Possibility of a communist takeover due to the political turmoil, or even a paternal autocrat such as Petain to come to power, army should get events which lower org and morale as soon as they are at war with Germany, this will however ease if France can hold Germany. France should be able to choose if they will hand over the Saar, regardless of what the occupants vote, this could give the option for Germany to declare war. Similar to Britain they should be able to declare war on Germany if they go against the laws of Versailles, but at a high dissent cost so the AI wouldn't usually or never pick it.
USSR: More starting dissent, and a possibility or Trotsky returning to power (add a description and unique benefit to Trotsky). High revolt percentage in Ukraine and also a possibility of releasing them. A chance for the Romanov's to come back to power, maybe a bit to much to ask though. More purges but also a chance to save some commanders such as marshal Tukhachevsky.
Austria: A chance to re-unite the Austro-Hungarian Empire, or at least add cores from event to it.
Some of these requests may be a bit to much, but these are my suggestions
