The US Subchaser was not a "must have unit" and since we were not happy with the way it turned out - should have been a wooden hull subchaser to beat the heck outta uboats - we left it out. Kind of "quality over quantity".
The wasp is not 100% historically accurate. Its meant to represent early fleet carriers of the US Navy without running into potential legal trouble with the owner of the Yorktown...
The two aircraft modelled are the Buccaneer and the Buffalo. So no Helldiver but it looks close. Why these planes? Well... let's just say we know one or two things about them planes so there was no confusion.
Oh, and you just gotta love the looks of Japanese Heavy Cruisers