What us bards are pissed off about is the fact that they nerfed the GM effects of bard before the unique ability comes into play.
Before the update we got +15 HP, STR, +50 Music Buff Duration and +5 Music Buff Effect.
After the update we get +15 HP, STR, +30 Music Buff Duration.
So basically it should of been this:
+15 HP, STR, +50 Music Buff Duration, +5 Music Buff Effect AND +5 Music Buff Effect, +30 Music Buff Duration (If unique is active)