You are wrong. The ability activated in a nano-second and allowed no counter-play.
Hardly, it took 3-4 seconds to suppress originally.
Most people popped it the second they saw you too so all you had to do was turn around. Or use line of sight/shot blockers. Fast for Coh2 standards, but not really all that fast imo.
Regardless, there's a great deal of wiggle room between original volley fire and current volley fire. If on command suppression is too powerful then change it to something else. (Which it may very well be for such a cheap and spammable unit, perhaps making it a vet 1 ability would balance it out)