Jobs Such as RDM and Bard should be highly valuable to groups because of their vast utility, however bard does too much damage alongside it's utilities, RDM doesn't have enough damage to sustain it's utilities.
The fact that bard is the best receiver of alot of this games damage buffs, is a problem. BLM and SAM should ideally always be the best, brd burst should be weak as should it's dps since it's overwhelming amount of utility is already strong enough to warrant a spot in any group. This job is overtuned while rdm, one of the mediocre users of the same damage buffs, has nowhere near the same amount of raw utility and damage. SE put a large amount of this jobs value into a raise.
Yes you could tweak the numbers to make any job "meta" however what job isn't meta, is going to end up here crying for the same thing, Wanting your job to be meta isn't balancing the game, trying to remove unhealthy synergies is far a bar better alternative and is generally the only way we'll move forward where the meta won't be heavily dominated by Bard and dragoon. Nerf Bard's dps or remove disembowel. the latter would only cause mch to compete in a losing battle against bard.