I'm not really worried about 8-24 man content.
Even if we're 30% below other DD's, we're going to have a spot in coil, and we'll be fine in most larger group content because we can buff several other players to make up for any deficiency.
What I'm worried about is the DF making 2 bard AK parties (or any 4 man that has a type of encounter like Demon Wall that's built around a damage requirement and/or DD limit break).
If you're not MASSIVELY overgeared, then those types of encounters that are tuned for a certain item level simply won't be possible with properly geared Bards if we're 30% below other DD's, still don't have a DD limit break, and our songs don't really do anything to buff another Bard.