Personally I would've preferred an enhancement to the job's most iconic trait. For example :
Warrior Master : Double Attack has a chance to Triple Attack, Double Attack potency increases Triple attack chance rate.
Red Mage : Fast Cast has a chance to proceed Quick Magic instead, Quick Magic rate increases with Fast Cast amount.
Thief : Triple Attack has a Chance to Quadruple Attack, Quadruple attack activation increases TH upgrade chance by 50%.
Etc. Etc.
But like I said before, I'd settle for being able to use the Motion command with job emotes. =/