These 3 aircraft are not high speed fighters nor have enormous bomb payloads but were probably some of the most influential aircraft of WWII. First the JU52 should be added to give the axis a trasport representation in game. It would give an option instead of upping a goon for every base capture.
As for the Storch and the Grasshopper, they could be used in game as GV spotting and marking aircraft armed with smoke rockets. Both aircraft were used in this role extensively, although the smoke rockets were not utilized. The Grasshopper was armed with a field mod in some cases with Bazooka rockets and attacked German armor in the later part of the war. The smoke rockets although not 100% historically correct would give these two aircraft a niche in game and allow attack aircraft and friendly GV's an aiming point. The last dogfight of the ETO was between a Storch and a Grasshopper. The pilot and the co-pilot of the Grasshopper fired on the Storch with their .45s and forced it to the ground.
Just a thought to give more options and depth to the game. Feel free to flame.