Volley mechanic seems to be written giving the sense that it is an hindrance to side that has to implement it, correct? But first things first: Is Volley mandatory (as it seems to be)? Secondly, given the fact that when using (and if it's mandatory it will always happen every time you Direct Fire with one of the Heavy Armor units in the stack) volley fire BOTH units are marked Ops Complete, it seems that we are "trading" the entire FP dice of the second unit in the stack for just a +1 to FP dice of the first (and only) unit to Fire (and indeed act). This is quite detrimental and would force such forces to heartily avoid having 2Heavy Armor units stack in the same hex. What is the rational for this mechanic?