While there is some use for the system, it really isn't that meaningful. Sure it can be appropriate for a WHM to choose between PIE, MND & VIT (top tier content), but why do they have the option to put points in STR or DEX which does nothing for them?
Personally, I think it would be a more meaningful choice to put points into secondary stats (including PIE in this). Sure many classes have a *best* choice, but at least it's not as clear as, say, DEX vs. STR for a Dragoon. Although, for this to work, the secondary stats would need to be normalized so that on average, one isn't clearly better than the others on a point/point basis. Oh, and merge skill speed/spell speed because there's really no good reason for them to be separate.