The B5N is suposed to be enabled, I will check the seting's.
Yes their is a reasion the Ki 67 and Boston are enabled.
If you had just the Kate and the VAl aganst the SBD, you would have a problem, the SBD is realy a mid war plane and it is a very deadly plane aganst the Zero, it's twin 30's in the tail can kill a Zero easly and it's twin 50's in the nose are effective aganst the Zero as well, and it handels decently enought to be able to get kills aganst it. The Kate is basical unarmend and is for the most part not a plane anyone is going to use, and if they do they likely not to reach their target, the Val has half the bombload as the SBD and while it does actualy have guns it is still in now way an SBD. What you left with in this case is the allies haveing three efective planes the Huricane the P40 and the SBD aganst the Zero. The bomber equation is also compleatly screwed and only the Kate has a bomb sight.
With the Boston and the Ki 67 enabled the bigest problem we have is the incessent whining that occures because they are to fast to be caught most of time and this is realy irating people, folks we nead more planes to do many of the set up's we wnat to do and do them right untill then at times we are going to have to make do with what we have. Personaly I dont bother trying to intercept the buffs on this map I look for the fighters to go and kill, I cant catch them they arent going to do much if any real damage if they reach their target and their their so people who like buff's and their sights can have a toy to play with.
Other posable Sub's and why their not being used:
JU 88, get real this plane has a 6K bombload, almost all Japanese bombers caried around 1800 pounds, it's way tougher, can dive bomb (somthing japanes Twin engined Buff's couldent do), It's German, ect...
TBM, well this mid war plane actualy more deadly to the A6M2 than the Boston is in terms of it's defensive firepower, it's two forward 50's are also more effective than the Bostons 303's , and it's not Japanese. Again the down side hear is that were tiping the scales back in the Allied favor in the bomber catagory by puting a plane in that is more deadly to the Japanese than it is to the Allies.