There's some definite gaps that are in desperate need of filling. ESPECIALLY the Japanese plane set. I don't envy scenario designers trying to figure out PTO setups. The early naval battles are decently covered with the A6M2, B5N and D3A, however the G4M is a glaring hole and the IJAAF doesn't have an EW fighter at all. The Ki-43 is BADLY needed for late EW and definitely MW, and the Ki-27 and A5M would be quite welcome for variety (Allies have F4F, Spit and Hurri I, P-39D and P-38G for the PTO, Japan has the Zeke) in EW as well. Additionally the A6M3 would be invaluable as an intermediate between the A6M2 and A6M5 (A6M2 isn't appropriate for mid-42 until the end of 43, and the A6M5 is too late). And because I KNOW someone is going to respond with it: the D4Y. The G3M Nell would be an interesting inclusion, especially for an AVG scenario and I think I've seen the Ki-45 requested rather frequently. For that matter, the Japanese don't have ANY fighters that are actually appropriate to an AVG scenario, (Flying Tigers only encountered Ki-27s, A5Ms, and Ki-47s. Any Zeros would have been well after they were absorbed into the USAAF) and only the D3A and B5N would have been encountered.
