I would put the need to fill out the Japanese plane set much more so than the Italian plane set. In the scheme of things, Japan was a far much larger player in the war than Italy was and is grossly under represented for being one of the 5 major combatants.
ack-ack
Very true, I always stressed for having more "Burma campaign" aircraft as well as Japanese, along with the Italian aircraft. My reason is we have hardly anything for the Burma Campaign - now we do! Hurricane B, Ki-43 were common plane sets in Burma, wellington bomber and G3m (however Betty will do just fine).
I would like to see the Burma and Singapore campaigns soon, but we would need the Beaufort bomber, not sure how side balancing would work out being the Dutch only had a few fragment squadrons in the area. But with more japanese plane sets we can add addition scenarios to the Pacific.
Italian theater I wouldn't mind having a Gothic line type Scenario, Allies would be after factories and GV bases while the Axis hopelessly try to defend - poleski raid would be included in that as well.