YES! I wish I could place a patrol point that my units would hang around so they can help defend spots of my choosing. The ability to turn on and off of these patrol points would be excellent so I can chance where they patrol at will. Make it a 1x1 block called "patrol point" that turns on and off by clicking on it.
Even if you make it that only one can be active at a time would be great! (Multiple would split your forces evening between "patrol points")