It seems following mode is troublesome when paired with leader who is automaton, or lets say that is using fate botbase, since it cant wait for the follower to get closer then move again, especially on the ground where there's so many obstacles that can make follower stuck then lose track of the leader. Flying seems ok if they're up high with no mountain of rock and stuff. Maybe if theres distance parameter of the follower that can be set to more closer, it may work >.<
Oh and, if ur leader is ranged or caster, and ur follower is melee, when leader take on target that is far away, follower cant assist the leader. It will run forth and back without touching the enemy because of the distance that bond between leader and the follower >.<