From a storyline standpoint, I liked the classes and how they showcased an evolution of your character when you finally graduated from "adventurer preschool" to full-fledged job status. From a game design perspective though they're pretty nightmarish and it's clear that the original intention of their existence (branching jobs like SCH/SMN) led to so many balance issues that the devs have decided it's better to scrap the whole thing outright rather than continue down that rabbit hole. it still honestly makes me a little salty that so many SCH balance issues stem from sharing ACN as a base with SMN, so I'll be happy if the devs actually decide to rework those two at some point to make individual tuning easier.