another stealthy feature is the control over formations using left and right clicks.
The simplest way to see it is to give a move order with a right click, not let go of the click and either press right click to cycle through formations or WAIT with the left click pressed. Alternatively you could left click, hold down the click and drag.
The amount of time you have to WAIT above, depends on lag. The amount of time you have to drag the move order also depends on lag.
The result is either a formation move or a standard move order, which will have a drastic effect on how your units approach the waypoint.