IMHO India IC only good vs n00bs.
1. UK has less IPCs to build transports and units to ferry into Europe. So UK comes into Europe slower. So Germany has more time to attack Russia. Bad.
2. UK has less IPCs period. Industrial Complexes cost a good amount.
3. Japan captures IC, and look, you just gave Japan a nice little present that cost YOU IPCs. Saved Japan player IPCs too.
The last, you think, can be countered with Russian reinforcements? No way.
A). If you fly fighters to UK, those fighters cannot be used in hit and run attacks. (Let’s say Germany holds Karelia with one infantry; you sent two West Russian infantry and a fighter to attack the territory. You kill a German infantry, you gain 2 IPCs from the territory, and Germany has to retake the B)country. But say you just attack with two infantry, your odds aren’t as good. If you attack with two infantry and an artillery or a tank, even, then you’re commiting 10 IPCs to gain 5 IPCs, you can’t do that for long even given the fact that the trade gives you a small positional advantage. My belief is that Russian fighters are properly placed in Moscow, where they can attack east or west.
B) If you send land units to India, it takes three turns to get there from Russia, two turns from Caucasus. Either way, you are pulling infantry from the German front, which means Germany takes USSR countries, so USSR makes less money. If UK loses a few IPCs a turn, it’s no big deal; UK IPCs are relatively inefficient (for cost-effective ground troops, you must first build transports, then you have to make sure the transports are protected, all that takes valuable time). USSR on the other hand, you pop out an infantry, and that infantry is ready to go; it just has to march to the front.
C) Even with Russian reinforcement, Japan can pull infantry off the islands, and run tanks in from transports from Japan. Combine that with - what - six fighters and a bomber? Things get very nasty very quickly. You can’t defend EVERYTHING.
D) Out of the box rules, you risk turn 1 Germany goes for long range aircraft and takes UK. Risky, but doable. A couple of Russian fighters in London helps a lot.