I think once they add lullaby the complains will subside.
While brd COULD use an atk up song their role in battle would not change.
Lullaby and debuffing are the only two things I can think of that would "change" a bard's role in the party, *somewhat*.
I think SE was smart in making songs last so long, and making the relic make them last even further. Refreshing the songs is the least appealing aspect of bard.