That's not even close to its average time to kill. Most if not all people will never consistently 3 shot enemies with the last word because you need two headshots and one body to get its fastest kill time. The average kill time is barely faster than your average legendary handcannon but the range is so limited that it really only competes at just outside of shotgun range.
Have you used it? Wtf. It has 8 bullets most of the time will be used to kill 2 people then you have to be within shot gun range pretty much or damage fall off will do a lot. Quit crying and counter it
Yes it was even better pre patch. Still the gun has a ridiculous ttk.
Look at the ttk charts and you will see that most weapons are balanced. It doesn't make sense to buff all auto rifles because one gun has made them obsolete.