Giving access to all weapon skills is not the same as being able to spec every ability in every ability tree of wow, FFT's skill setting is much akin to subjobing your analogy fails.

Further more up until now save for certain class restrictions for select weapon skills you could learn any weapon skill or quest any weapon skill, you speak of the game's structure well this goes against that very structure that has prevailed since the start of the game, you also speak of not being forced to merit certain skills but if you play rng sam and drk primarily but use say pup mnk every now and then because you enjoy them well SoL you merit what's best for your best jobs, not for fun, not for balance, not for being a snowflake either, or in your case just a flake =.=