Sounds interesting,
I do find the idea of Allied/British planes against German planes, Japanese planes against American/British planes , etc, etc, intriging.(SP)
However, some countries planes (Japanese?) might suffer lack of use if a rolling plane set concept is used. Why?
Well, my opinion, in the latter war years, most Japanese planes (like the Zeros) were not a match against the Allied (American) planes available (F6F, F4U, Spit IX). In the early war years the F4F needed tactics and good skills against the Zeros.
But in general I would prefer that AH not adapt the "Color Countries" concept now used you know where.
delta