BRD's utility isn't all of it. They also gain the most from crit rate raid buffs such as Chain Stratagem, Spear, and Battle Litany, which can push their spike DPS levels high enough in order to match selfish DPS. All of BRD's procs are based on their DoTs critting, and you can essentially double their crit rate in ideal conditions, but often bump it up enough to reliably spam through the majority of Ballad and hit Pitch Perfect between every GCD in Minuet. Keep in mind they can also snapshot these buffs in order to prolong their benefits too.
A Dragoon is capable of nearly matching BRD's raid contribution just by grouping with both Ranged DPS, through a combination of Litany and Piercing.
A Ninja already comes close to matching what a BRD can do via TA alone.
A Scholar can match it with Chain and Selene.
BRD, however, utilizes raid dps buffs better than any other class currently. They are too weak without them and too strong with them. That is the problem.
Their exclusive non-dps utility isn't even that good. I'd take Dismantle over Minne/Troubadour in Savage any day. Refresh is broken and MCH is weak and clunky.
All RDM brings right now is raise. SMN outclasses it in every aspect. And even can raise in prog still. Embolden is good with enough melee/ranged dps but terrible with a single co-caster.
BLM is fine. It's probably the most well balanced class at the moment. Yes it has mobility issues but it can circumvent them with enough player experience, fight knowledge, and adapting to procs (lest you want to be rescued out of F1 for greeding). It's the one class that doesn't -need- to be changed at all in this entire expansion, but would appreciate it nonetheless.