Impy I know you wrote this somewhere else:
"Japan (Lance Torpedo) = FTR gets +1 attack modifier in naval combat, DD fire in the opening-fire instead of main-round for first cycle of naval combat. "
So far we have used this NA for submarines only. Perhaps it would be a better play to go for a modifier for destroyers, attack during opening fire step of combat during the first cycle of combat only! Subs were armed with a smaller versions of the Type 93 torpedo that had a shorter range (5,000 to 12,000 meters), called Type 95 and 97. I dont think the Long Lance were airborn so a +1 modifier for fighters isn’t right in a historical point of view.
The Japanese Navy outfitted many of its destroyers and cruisers with the Type 93 torpedo (Long Lance). The long range, speed, and heavy warhead of the Type 93 gave these warships a formidable punch. The Type 93 had a maximum range of 40,000 meters with a 1,080 lb (490 kg) warhead. In comparison the 16 inch /L45 guns mounted on the then-current US Colorado-class battleships fired a 2,110 lb (957 kg) shell to an absolute maximum range of 39,600 yards (36,210 m). Practical ranges for both weapons were much shorter, but still fairly comparable overall. In early battles, Japanese destroyers and cruisers were able to launch their torpedoes from over 20,000 metres out at unsuspecting Allied ships that were attempting to close to gun range, expecting torpedoes to be fired at less than 10,000 metres, the typical range of that era. This weapon, coupled with the flexible night battle tactics practiced by Japan’s cruisers and destroyers, led to victory after victory in the early stages of the war. Only as American radar and gunfire control became increasingly sophisticated would the Japanese advantage in night battles begin to disappear, and even then a Long Lance-armed Japanese destroyer was still a thing to be feared.