Combat Tour may address this desire for an increased infantry role. From what i've read, ground targets will be greatly expanded in CT. Including troop trains, armored and non armored road convoys and some infantry ground targets, such as artillery positions. However I doubt anyone will be ordering companies of infantry around. As stated previously, Aces High is primarily about the Air War.
But I agree with expanding the infantry target list. It certainly would make the role of tactical aircraft more interesting. Personally I'm getting a bit bored with shooting at houses, field guns and the odd panzer here and there. Been there, done that.