I feel that one of the limitations of the song needing a target is the single target magical puny potency they deal. I wouldn't think it would be such an issue to turn them into AoEs centered on the bard that don't need any target to fix the issue and improve usability a lot.

Although this accounts for the rigidity of bard in downtime, I do think that they need to do something about empyreal arrow which is still the main drifting and clipping culprit of the job, especially when you don't run exactly at BiS speed (but even at BiS). A second charge would immediately come to mind.