No you are right. Chemist was an Item Specialist, potions healed for more, Arctic Wind doing more damage.. etc.
Printable View
I doubt there'll be jobs for crafters. I also don't feel any need for them, an am pretty convinced that there are plenty other areas of the game that need the dev resources much more.
http://finalfantasy.wikia.com/wiki/Chemist
Basically Chemists just use items better and have access to special items (GRENADES). They can also mix items on the fly to make new ones (so kinda battle synthesis for offensive type items).
Though I think there are other things more important to focus on right now the job system could be a perfect opportunity to add in fighting elements to the craft classes.
I can see jobs for DOL but not for DOH
Botanist - Lumberjack?
Fisherman - Angler?
Miner - Archaeologist?
The crafting classes are as specialized as you can get.
That's not splitting up the current ones into specializations, that's just adding 3. Those are 3 that could certainly be added but those would be classes, not jobs.