Not the worst ideas i listen in the last times. But overall the way they should go is the same they went on PvP Jobs.

They must kill the 120s meta and rebuild every job on a personal scope. Every job must first make fun to play solo, if you hit a normal enemy on the map, in a dungeon or in a raid. Personal limit breaks, combos, switchable skills like healers do damage with heal spells to enemies and heal others. The job mechanics must be the base of there skills, integral need to use them. After they make every job on that level, like they done it in pvp, than they must add skills that go on in raids. Synergy is not even important for that. Because come on, nobody need 10% damage buffs... when you have your personal 10 seconds of son goku kame-hame-ha on the right moment that you time yourself on a raid where it is important. Like the one fight with nebrealis. Where everyone wait for the melee limit.

We most go on form "sweat shop unification project" we have now to "personal identity for everyone". And than we can design the old content on this! Its a challenge for them to do this!