I can say with certainty that, while the exact balances change for most classes, BRDs have the "privilege" of having a stat that's nigh useless for them: Skill Speed. All it does is drain TP, and every point in skill speed is a point that could be in Crit, which affects their bloodletter procs.
Other than that, on the other end of the spectrum we have BLM, who gets a LOT from spell speed (i've heard there's a sort of cap or something, though) and det and crit.
There's SOME wiggle room, but in general most classes have a stat you don't need a whole lot of.
