You miss the point. FF2 still had a way to define your class as a thf or a blm or a whm or whatever.
7 still had a defined system. Aeris was a whm. Tifa was a mnk. Yuffie was a ninja. It was defined, regardless of what abilities you could customize them with.
8, same thing as 7.
In 14...you can give a Gladiator cure from a conjurer...but that Gladiator won't be a "paladin." You can give a Conjurer cure....but it won't be a "white mage." You can make your Con use fire...but it won't be a "black mage." Do you see what I'm saying?