The simple fact that parties were stacking bards to rotate their songs back in 2.0 shows that the nerfs to BRD were very much needed. Other jobs have utility, yes, but none as incredibly potent as BRD and MCH have. You can argue about it as much as you like but it doesn't change the facts; we've not seen parties stacking other jobs for their utility as we saw with BRDs.

Do BRDs and MCHs need some attention and buffs? Yes. But don't ever expect them to be returned to the level of the likes of SMN and BLM as SE is well aware that parties would start stacking BRDs and MCHs again if they dealt competitive DPS whilst giving the rest of the party infinite resources.