Basically Otto wants to form a double-line type formation using the follow command to maintain the 2nd line. However, the command doesn't work well in CoH, where you can't group select following units so they may miss their retreat. Also, the actual follow will screw up if you rotate your squad to fight off a flank because the following squad will always try to stay at their 6 o'clock. This can lead to them running out into the open toward the enemy. In this case, it's always better to micro the units yourself.