Bards have no burst damage... My bard is in full DL and relic +1... Best crit, mid 500's... Monks, Dragoons, Black Mages etc... All crit for well over that... My auto attack is less than 200 w/o crit, and the only way to do any burst dmg as a bard is to have rng luck and get blood letter and straight shot to proc back to back... I had that happen once, and when all was said and done, in that 2.5sec timeframe, I managed the equivalent of 1 BLM crit.
OP we are not, we just happen to be affected less by necessary requirements to move. How about instead of rooting or damage reduction, require higher ACC of bards... I.E. Lower ACC = missed shots while moving. That by default would lower dmg but wouldn't feel like a nerf bat to the balls because other players are mad we do the SAME, not more damage that they do.