So at the moment, the move order increases speed by 10-50% based on Unit and Formation skill. The issue with this is (EX.) a group of 4 can come in and 3 can keep harassing enemies while their commander executes a move order and runs off on his own to outrun a fleeing enemy.
This basically means individuals can run off by themselves as long as they belong to a unit of 2 and run at least 10% faster(if not more) than their enemy
What needs to happen in my opinion is you need at least 1 other person standing in a leaders formation template to begin to experience order effects. This would scale so say 5 men in a formation template with high formation skill would move 50% on a move command, while 2 skilled men would move at about%10-20%