well in away it could work with hoi4. you just draw a line on the map, where you want that division to set up after attack, and facing. and then next division continues next to it. longer line you draw for division to defend, more weak it is againt pinpoint attacks of armored spearheads etc, but more invulnerable against artillery barrages.. in that way, with short line, division has maxium effect and can even keep reserves behind in rest, while with streched line there is no reserves behind and everyone is at front, or something like that. and also, it could be determined that how widely you attack with division as well. in this way, you can make multi layer defences. in small area, comparing it to province system where second line is 50km behind the first. ive played such an game some 15 years ago, which had this system in use, and it was good, just cannot remember the game name anymore. but it worked. then, in mapmode, there could be one mode, where you can see all possible locations for field airfields, and make one of those as airfield just by landing your planes there and supply trucks would follow/go ahead there to wait planes to land. no need for IC to build airfield, which was the case in russia. open field is an ready airfield. and there was lots of field/plains for example.
also supply/logistical issue can be calculated easily, more away you are from railroad, more time it takes for trucks to pickup the supplies for the unit. that makes controlling the railroads major issue, which it was in real life too. they were the lifelines. there is already distance tool for airplanes, and almost that same tool can be used to determine with current road level structure/if forest/hills/mountains/swamp, that how fast the supply is going, on open plains, trucks can drive on open plains, when its not the muddy time/winter.
well for winter there was those snow plows or how u call it, opening roads from snow.
