If Bard got a damage buff every other job would start clamoring for an essential group utility.

When 2.0 launched there were parties stacking BRDs so they could rotate songs. BLMs were rendered useless because BRDs could do everything a BLM could PLUS they could move while attacking.

Hate to break it to you OP but BRDs used to have comparable DPS and they were nerfed into the ground to compensate for their group utility and mobility. If you want a damage buff you either have to lose the songs or lose the ability to move while attacking. We've already seen what happens if BRDs get to keep those along with a competitive damage output.