At release volley fire actually worked too.
At release volley fire was incredibly broken. On June 23rd when OKW and USF were released and barely 10 days later they put out a patch fixing it. In their own words "Volley Fire was another big issue that we wanted address; the design intention of this ability was to be used as a support ability to give rear echelon combat utility. However what we ended up seeing were rear echelons winning engagement that shouldn’t have won. There was also an exploit with the modifers that were applied when rear echelons equipped with bazookas would fire bazooka shells rapidly."