I kinda agree with the above poster.

There are, however, battles where it IS important to have pacification removed or prevented.

Mainly Bis Ex atm.

If you use Berserk on Bismark's back, you'll be under pacification right when the colored adds spawn.
And you can't waste provoke on them, chances are you'll need it tank swap in the next 5 seconds.
There is enough time to a Bard to cast the Warden Paeon buff after jumping out of Bismark's back. There is nothing to attack. No bard dps lost at all.

I'm sure there are other cases where it's totally possible to prevent pacification from berserk and not being a dps loss for bards.