This is something I would really like to see in the game, so I am posting my idea/suggestion to see if it would gain any support or if developers would note it.
FFXIV has the armory system making it possible for everyone to level every job, and while I find that fantastic for DoW/DoM jobs, I do not find it to be very efficient for DoH/DoL jobs.
In the end, everyone will have every crafting and gathering jobs leveled, anyone can make anything they want themselves or gather anything they want, making it nearly impossible to profit out of these jobs or to help people.
I don't know how it would be done, but I really would like to see a specialization in these jobs. Either you would do some sort of quest for one of the jobs and gain something.. more..skill? A soulstone? More levels? I don't know. After which you would be better in this crafting or gathering job than anyone who did NOT pick that specific job.
Add more recipes that are "higher level" for those jobs. Or give them new skills beyond that point.
I would prefer to be able to pick one DoH and one DoL job, but if needed, just one from either category would be swell too, I guess. Picking a gathering specialization would feel risky but fun. /smiles