Hello Darkranger and welcome to A&A.com. I know I may not seem very qualified to be answering a question due to my post count, but I’ll give your question my best shot.
The main reason for separating the UK into two economies is to prevent them from being too mobile of a power. With a Major factory in both London and India, The UK (And its starting income of 45 with potential to increase in Europe but lose in the Pacific) would just be too flexible.
The UK basically has 3 territories that they really don’t want to lose, in order of importance: London, India, Egypt. If they UK is making more than 40 a round and can spend it anywhere, they can make a panic defense of London or India very easily (and Egypt but to a lesser extent due to the fact that it is lacking a major factory, and requires a minor one to be built). If the UK had the ability to spend both UK Europe and UK India’s money wherever in the empire they desired, they could play very flexibly, and this would be a serious disadvantage to the Axis.
This combined income would end any chance of an invasion of London by Germany (Operation Sealion), which is a very real possibility in this version of axis and allies if the UK isn’t very careful. The extra few IPCs that the UK could spend in London instead of India would be able to stop this invasion, and if Germany spends all of its money for a round on transports for London but is unable to invade it, they have essentially wasted a lot of money that should be going to Russia. The threat of Operation Sealion is crucial to controlling UK Europe’s spending in the early game against Italy, and if the UK could just spend India’s IPC’s in London for a round, those extra 3 infantry or so would make Sealion next to impossible.
The combined income would be especially apparent with India because it has a minor factory. In Axis and Allies Global 1940, India’s income will quickly be knocked down to 10 IPCs or less by Japan. However, if the UK was one economy, the UK player could continue building many units in India until it became impenetrable to Japan (which would probably only take 3 rounds of building 10 units a turn), and if Japan has no threat on India, it likely has no shot at doing anything in the Pacific. After this build up the UK would be free to use all of it’s income in Europe, or continue spending in India, depending on where it would be needed.
The most likely UK strategy that would occur would be for the UK to spend all of its income in India early (except required land defenses for Egypt and London), which would completely stop Japan very early in the game if the US focused there as well, before transitioning its full force to Europe. The only way to prevent this strategy would be for Germany to threaten Sealion, which would of course easily be stopped because the UK would have too much money from the combined economy.
The original reason for this split was because Global began as two different games as has been stated above so there had to be one UK Power for each game. The simplest way to combine the global game is to leave these two separate powers separate, but it is also probably the best for game balance and to give the game more of a “Global” feel rather than a Germany has to win really fast in Europe while UK and US smash Japan really fast and whoever accomplishes that first wins type of game, which nobody wants (because it really limits the amount of strategies that can be employed).
I’m positive that my answer is way too long for this question :-P, but hopefully it is at least coherent enough to answer the question.
Happy gaming :mrgreen:.