Disclaimer; I have very limited knowledge on the limitations and possibilities of the tools used to create scenarios, so i do not know if the suggestions i make is possible to implement.
First of all, this is a truly great scenario in terms of dedication from the maker, to the scale of the scenario itself.
Currently im playing the Germans at Civfanatics, and the US at Historic-Battles. But i have allso played against the AI just to check the capabilities of the nation i play. But it must be said that playing against the AI does not come close to show the potential this scenario have. Once i started a game as Germany, and the British AI sent all his Spitfires on suicide attacks against the German AA guns in France. This is not a challenge, its plain stupid. But i guess that is the limitations of the Civ2 AI that is to blame.
Germany; The initial setup of German forces is okay in my opinion. As Pap have allready mentioned, the attack value of the Ju-88 should be lowered some. But there is one BIG issue that needs looking into, and that is Germanys ability to land troops in Britain in round two and conquer the whole island. There are several ways to prevent this, and many suggestions have allready been proposed. Darius suggested in the Historic-Battles game that the German transports movement should be limited to 1 or 2. This would prevent the Germans from invading Britain in the manner shown in two games. But once London is taken, the Germans should get the tech to build the normal transport. This is essential for Germanys ability to fight the US later on.
I would also suggest to lower the movement rate of the Transport in general. Perhaps as low as 10-12.
Japan; Japan is perhaps a bit too strong in the beginning. The number of Japanese tanks is slightly too high. And the high movement of the Transports enables Japan to strike at targets absurdly far away in round two. Once again I think lowering the movement rate of the Transport would solve most of the problems. And it would give the allies more time to spot and sink the Japanese vessel. The Japanese fleet is as strong as it should be I think.
Soviet Union; The Red Army are about the right size i think. Pap have allready suggested that hes considering adding another bunker in Moscow and Leningrad. I think basically that is a good idea, at least for Moscow. Other than that, I think the Red army is okay as it is.
US: No comment really. If the player have any idea what hes doing, the US is the supreme ruler when it comes to Industrial output on round two. The number of units is about right I think. Pap have suggested to add more units in the Pacific isles, and that may be a good idea. But I dont think it is essential.
The US was and is the late game player. And it is important to remember that when comparing the two sides. In my opinion to make a good game, the Axis should be stronger than Russia, Britain and China. But not so strong that once the US enters the war, the game is effectively decided allready.
China; About right, allot of infantry and little more.
Great Britain; In my opinion, this is the country that needs the more tweaking. It is simply too vulnerable to a German invasion in the beginning of the game. If the movement factor of the German transports where reduced to 1 or 2, I think that would fix most of the problems. But I would add some more infantry units in England. The number of AA guns is adequate I think. In Asia, Britain is facing much of the same problem, very mobile Japanese transports. In the Civfanatics game, Darius was able to capture both Bombay, Bangalore, Melbourne and Rockhampton in round two. I think that more than anything illustrates what Im talking about. The number of British forces in Asia is about right, but I would consider adding some more infantry in India and Australia.
A huge scenario like this will allways be difficult to balance completely. And the skills of the players involved will allways make a big impact on the game, as it rightfully should. What it fundamentally comes down to it that this is a historic scenrtio, and in the spirit of that i suggests that one should try to match the historic facts as much as possible. When i say historic facts, i mean the strength and position of the countries forces and industry by 1942. Whtever comes after that is up to the players!