First time poster here, I saw a similar post on r/companyofheroes, about the uselessness of volley fire and frankly how much of a gimmick it is. It takes 20 munitions to cast, does barely anything, only affects one squad at a time, and on top of that, turns RE's into wet paper towels. So, as the aforementioned post said, A good buff to the usefulness of volley fire would be to make it free when inside of fighting positions, since that's where RE's seem to do their best already w/ Rifle grenades. That way, supplementing an RE squad with a 60/70 munition BAR/30 cal. feels like a good decision.
Either way, I think Volley fire is the most useless USF ability currently, and needs work.