Best scenario I managed to pull off with this feature was using an MP-40 while capping the Central Station.
Got a kill too, while putting suppressing fire down for my teammates moving up.
I found, this feature is suicidal in blatantly oblivious spots, but in ruined, blown out places where spotting ability is reduced it works not bad.
Just my two cents.
I think this feature could be called largely useless, fine
But just for ****s and giggles I re-installed good ole' Day of Defeat a few days ago.
And only then it is noticeable how far gaming has come, and how much more freedom and fluidity we have with weapons in FPSs nowadays.