Well, I kind of like the Bard being capable of raising everyone if the healers suddenly died, but I understand some Bards want more.

If they gave Bard their own Limit Break, people may complain that they are getting special treatment. This, I believe, can be blamed on design. Are Bards support, or damage dealers? Both? In the future, perhaps the support role may be added but for now it's not the case. In the end, if Bards have a Limit Break that essentially buffs party dps, only one thing can happen: Will it be superior or inferior to the Damage Dealer LB overall? One or the other will be obsolete in most cases, I think, which will cause problems down the line--if not instantly.