I still say they had an opportunity to have different Jobs branch off classes when they reworked how SMN/SCH diverge from each other through traits and just different skills learned. Yes I know they did it out of necessity and they struggle and regret the design philosophy behind ACN to SMN/SCH and they'll never do it bla bla but that doesn't detract from it being a pretty good system to make different specs basically. But that's perhaps better served in a game where class balance isn't held up so high that class personality/fantasy becomes lower priority.

All that said Ranger would've been a slam dunk in my opinion but at this point it'll most likely never happen.