1. More French two-seaters, Caudron G.4 would be heavenly
2. Less Sergeant pilots in the RFC and more 2nd LTs
3. Animated Observers and machine gun drums/belts and charging handles
4. Some simple game mechanics to spice up two-seater recce and artillery spotting missions
5. Walking troops advancing across no-man's land and modelled artillery batteries
6. Hitting a fence at very slow speeds should be more survivable