"Achieve"
Your specific example is interesting because to attain that, they had to remove a strategic option. Sure, most hungabunga-WARs avoided Inner Beast like the plague, but, if things went down, they still had the option to pop Defiance, use Inner Release, and spam Inner Beast to refill lots of HP, while, let's say, waiting for the RDM or SMN to raise the two healers.
If they keep removing skills and thus, options, it will only make fights be on rail even more, since you will have less way to overtake a bad situation.