To clarify: I don't mean which specific classes, jobs or abilities you want to see implemented (though feel free to use some as examples); I'm interested in how people think the Armoury system and character progression could accommodate new ideas and ways to keep things fresh, no matter how outlandish or unfeasible.

For instance, I'd like to see a soul crystal or two that could be applied to any base class and turn it into a second job for that class (or third, for Arcanist). Of course, that would play havoc with abilities; naturally, you couldn't make a single set of skills and spells to cater for all three roles. So while you might still gain generic abilities from job quests, like generic buffs and attacks, there would need to be a different way of earning class-specific job abilities. Something similar to the Blue Mage would be perfect for this, though there could very well be other methods.