As i understand it, for obvious reasons, the game will have more and more new modern equipment. Especially lightly armored vehicles
And for the armaments of the Cold War of the Arab-Israeli Iran-Iraq wars will be less attention In those days, of course, operations were planned and carried out using large tank units There were many battles tanks against tanks
But if the goal is to create the realities of modern combat, then it is simply necessary to improve the infantry AI, because all these lightly armored are not at all assigned to battle with heavy tanks. Their main opponent is infantry and not in an open field but in shelters, in trenches in buildings.
So I think the main thing is to improve realism in this aspect It would be nice if the infantry ceased to be a group of suicides, knew how to use trench and shelters, and buildings
About the same can be said about helicopters. Their AI also has a tendency to suicide.
Also, the interaction of high-explosive fragmentation shells with soil or with elements of fortification and others buildings