The walking animation in Arma 3 is very good, but it is a bit of a distinct style of walking. Exploring the animation viewer, I found two other perfectly good walking animations that could be used for AI. It really bothers me to put out patrols of multiple people because it looks very awkward to have them all walking in the same way, holding the weapon with one hand, arms out. Maybe the animation could change based on gear load? The animation simulates heavy gear so maybe lighter units could use one of the two-handed animations.