I like your ideas, a lot of them sent me on a nostalgia trip for some reason lol but like Carighan said it would lock out jobs from content. Which shouldn't be an issue in a game where you can play all classes on 1 but it somehow is an issue.

It sucks, since Final Fantasy, traditionally isn't about balanced jobs. It's about bringing the strongest jobs to encounters. Which is what we had back when Titan was the hardest encounter, MNK use to slay for that extra blunt damage, Summoners used to be able to stand in tank with Titan, Eos was a pure healer Selene was a buffer/debuffer(silencer), AST card RNG was garbage but man was it fun, Aggro was a thing. Good times, but people that focus on 1 job, in a game where you can play them all on 1; complained at every turn after every patch. I don't think we're going back.