Personally it doesn't bother me. If Bard has a damaging LB, what shall it be? Physical LB we already have the melees doing it, and given that PUGs are only bringing in one melee just for the LB for some of the instances, if Bard does "Final Heaven" then I think melee will be even out of job.

Ranged LB? You already have BLM/SMN doing it.

As a Bard my asset is 100% mobility, 100% uptime. Rather than finding the right time to cast LB due to long cast time and animation lock, I'd rather run around and continue my pewpewpew

Anyways BRD's healing LB isn't that bad. Used it a few times in Ultima HM fights during 2.1 release and it does save the day.