I don't think HTC is wasting their time with early war aircraft at all. I like the Kate, Val and Dauntless (I voted for the D3A / SBD because of that). I am simply frusterated, and too vocal, about the specific versions of the US aircraft they add in for balance.
Why make a 1937 D3A, but a 1943 SBD? If they are going for a Midway set, then make a D3A1 (like they did) and an SBD-2 or SBD-3 (which they didn't). If they are going for the most produced model, then make the D3A2 (which they didn't) and SBD-5 (which they did).
The same is true of the TBM-3 and B5N setup.
It is also true of the F4F-4 and A6M2 setup.
In the late war setups the Japanese are using the Ki.61-I-KAIc (a lashup of an underpowered midwar fighter) and the A6M5b which carries with it the problems of the A6M series. Against this the US has a whole bevey of late war aircraft and upgraded mid-war aircraft.
The N1K2-J is too late and produced in too few numbers to be used in scenarios
It seeems that the Japanese aircraft are always the old versions fighting newer versions of the US stuff.