Hello...
I don't know if it can be made so there is some significant difference, but I'd like to see some sort of 'attack' variations for 'artillery' units. It would seem that much time and effort, depending on the country, was put into being able to target units for attack. And so, maybe there should be something in the game that reflects that.
The type of 'registration' for the battery as regards indirect-fire, 'hasty' or 'deliberate'. Which presumably result in an 'area-fire' or a 'specific target' being attacked. Also such things as 'rolling barrage', 'sweeping barrage' and so on. Since this seems to be the scale at which such things are applicable maybe they should exist in the game, if even as an optional setting!? Not all forces practiced these techniques so they should be made 'historical' as much as possible.
Dennis