From: United States
This mod looks very interesting. As a dedicated AFB, who unfortunately hasn't ever been able to sustain PBEM play, so plays against the AI, I'd like to talk more about the torpedo issue.
I know it was mentioned before, and it seems like an article of faith that it isn't possible to give the USN reliable modern (for the time) torpedoes, and still have a viable game.
I read this http://www.historynet.com/us-torpedo-troubles-during-world-war-ii.htm article, and while having only one source, and that just an internet piece, is crappy scholarship the article seemed fairly well researched and written.
If it is accurate, the USN's torpedo woes came from a perfect storm of bureaucratic idiocy, plain bad luck, poor design choices, and almost unbelievable failures of communication on many levels, the whole thing being too crazy to be believable as fiction, but nonetheless true.
All it would have taken is one calibration device that was properly aligned, or one naval officer who talked to the British about their torpedo experiences in 1939 - 1941, or a few dozen of the torpedoes tested at a secure location in the late 1930s using common sense methods, and the USN would have had modern torpedoes as reliable as anybody's in December of 1942.
Clearly, it would have made a big difference in the war, and it would make a huge difference in the game.
So, with all that in mind, given perfect freedom to make any changes I saw fit, I'd do the following.
1) Effectively set the scenario to play with US dud torpedos as off.
2) In addition to having more destroyers and escort ships at game start, as part of their fleet improvements, allow for comprehensive upgrades to improve Japanese ASW ratings on relevant platforms over the course of the war, since they'd have a much more dangerous and robust submarine threat to react to. These upgrades should get most Japanese ASW platforms to ASW rating 6, at the least, by January 1st, 1944.
3) Either mandated, or optional, diversion of Japanese industry to building/accelerating additional escort/destroyer vessels.