By nature of how crafters and gatherers are very dependent on leveling all other crafters and gatherers for vital cross-class skills, I feel like adding any more of these jobs would be very complicated, and difficult to pull off in a way that doesn't make the new jobs immediately redundant/useless. Endgame crafting/gathering already requires so much leveling, is there a large part of the community that wants that to increase significantly? I don't think so.

I think it'd be better to just get more creative with the AF sets in new expansions. Crafters, for instance, already craft items that don't quite fit their names- A lot of mechanical items and firearms are made by blacksmiths/armorers, so maybe their next AF set could be engineer themed. Alchemists are mostly known for potions, but they also craft a lot of plant-based items, so maybe they can have a gardener themed AF set. I dunno, I just feel like adding new crafters/gatherers isn't really going to achieve any new class fantasies that couldn't be pulled off all the same with glamour, since all items that could be crafted/gathered by new jobs can already be crafted/gathered by what we have.