Yoshi-P stated in the past that the devs view adding new jobs as a requirement for each expansion. They NEED that hype. But, I too, wouldn't be mad if they instead used that manpower for retooling current jobs.

That said, if we do see new jobs, my dream job's been an Apothecary/Chemist style healer with a focus on potion mixing, mechanically similar to mudras or dancer steps, to store buffs/debuffs and special skills while having a selection of basic heals to fall back on. It'd be heal over time like WHM/AST. It could actually fulfill the whole left from removing SCH's DoTs with some skills, too.

Main weapon is a set of bottles. Quest series is traveling for rare ingredients for potions. There was a hint that such a healer type exists on the First, too.

Judging by Chemist in Occult Crescent, the devs seem hesitant to add a healer with a potion user flavor and aesthetic with potions and ethers as items, despite most being literal garbage clogging up our inventory because of our skill sets and the rest being instance based. Deep dungeon sustaining potions and the stat buffers that only see usage in high difficulty. Pictomancer, however, is described to actively mix their paint mediums in combat, so there is that, too.

But I really want a healer that isn't wholly magical.