I, for one, would be dead set against boosting ANY Pacific island group to 2, and I am not thrilled with giving most of them even one. In my house rules for A&A Pacific, I take away the IPC for the Ryukyu and Bonin Islands and give them to Japan. I do give one IPC to New Caledonia because of its nickel production, and to offset having the Dutch as a separate player with the Dutch East Indies to draw on, and boost New Zealand to 2 IPC for the same reason. As for sea zones generating income, I like the idea, but putting it into practice is another thing.
Take the Gulf of Mexico for an example. Since offshore oil production was already taking place prior to WW2, you could easily justify an IPC value of 2 or 3, in conjunction with the fishing resources and commercial trade. However, does a German submarine in the Gulf give the Germans the IPC value, or does it simply deny the US the IPC? Giving the Germans the IPC is ludicrous on the face of it, but denying the US the IPC because a sub is present seems a bit much. Same thing could hold true for the Sea of Japan, the Mediterranean, the Black Sea, and the Baltic Sea. The best option is either use the convoy set-up from A&A Pacific and Europe, or go with specific recipient of the IPC with the requirement that to deny the IPC production to the recipient, a surface warship has to be present.
@Subotai:
It’s quite obvious that the reason why KGF is the most used strat is because US must build expensive units which will gain little money if US decides to go after Jap in the pacific. SZ worth ipc is an option, also making ipc a virtual value which not only represents industrial power, mostly in western/eastern Europe before and during WW2, but ipc value also does to a certain degree already represent political power and strategic important factors, like Norway is worth 3 ipc in AAR, China+Sink is worth 4 ipc… now that is fun for me as I’m Norwegian, but then the whole ipc element should be reconsidered when making different mods, or other A&A variants.
As for getting more combat in the Pacific, Subotai is correct. Building a navy from scratch is expensive, and if the US really had to start from scratch in WW2, the Pacific would not have seen near the combat that it did. However, the US did not start from scratch. You want more combat in the Pacific, then give the US the fleet that it actually had in 1941/42. Based on the scaling for the Axis navies, give the US 3 Carriers with 2 fighters each, 3 Battleships, at least 6 or more destroyers, and 2 submarines. For A&A50, add 3 or 4 cruisers. Then give the US the ability to build 2 transport automatically every turn to represent the enormous merchant shipbuilding effort of the US. The US Navy was built to fight a war in the Pacific, and was larger than the Japanese Navy, although from the game, you would be hard pressed to realize that. The British Royal Navy should have more ships as well. Both navies should be larger than the Japanese Navy. If you do not give the US and UK more ships, then quit complaining about not having any combat in the Pacific. Given the way the game is structured, with drastically reduced US and UK navies, and severely reduced US production, that is what you are going to get.
As for spreading IPC all over the map, I am not exactly in favor of that either. I would prefer to see them concentrated more, or in the case of Manchuria and Korea, see them broken up with each having separate IPC values. Another option would be to give certain areas two IPC values, one for the Allies and one for the Axis. The Allies did quite well without Borneo, Malaya, and the Dutch East Indies, but they were absolutely vital to Japan. Make them more valuable to Japan, so that Japan goes for them first. As compensation, boost the IPC value in the Allied home territories of the US and the UK, or boost the value of Australia.