I feel the same, but about the air section. I think it's too short. Now that Italy gets designs for free, it would be interesting to see the same with Germany. Maybe a focus of them offering their DB engine license to Japan and Italy and get something in return, if they accept. I'd like to see too, at the end of the military branch something like 'Organized Research Effort in the Axis', where all Majors of the Axis (Japan included) gets the shared research bonuses of technologies they already have. Stuff like that would be interesting.