Actually, I kind of liked the old "Dawn of Aces" artillery option. There were arty locations spaced throughout the terrain. You could call in artillery, acting as a spotter from either an airplane or zepplin. You'ld use the map to place the initial spotting round, then call in corrections to walk the barrage onto the target. The arty battery nearest to the designated target and in range would deliver the fire mission. You could also, as I recall, call in smoke rounds. I think something like this would be better than having direct control of the guns, as even a single player can direct fire without the need for a second to operate the guns. In addition to spotting from airplanes (could even designate specific a/c that would be used for this), GV's could also act as a spotting platform. Thus, a single player in a jeep, hiding in a grove of trees, becomes an effective striker. You could even add the option to call in illumination (star) shells for night, though that would of course be a lot harder to implement.
The downside of course is that the arty could not be used in the direct-fire role, i.e. as and AT gun.
