Browsing through the aircraft list for WW2 there seems to be one major omission - the Hawker Typhoon. I know that the Tempest V was superficially similar in appearance, but the wing-plan was very different and the tail-plane was also different. Bearing in mind that the old "flying can-opener" was a major ground-attack aircraft in the later part of the war it seems an odd gap in the range.
The other strange ommission appears to be that there are no Soviet aircraft at all - not even the Il-2 Sturmovik. :-\
We'd like to get some more planes, and they were actually on the schedule, but then the designer got ill. Until we can get hold of a few new designers, we're stumped really.
For the Sturmovik, Gandalf picked up a Zvezda 1:144th model of one a while back which I've got sat on the desk here, so they are available somewhere.