One thing in ffxi that was great was being specialized in 1 craft over the others. I would rather go to a crafter and know ahead of time that they specialize in say WVR and I am going to get the best from them that I can.

I suggest each player can dedicate themselves to a single craft and gain special abilities/skills/tools that offer improvements to their craft of choice. This provides identity to the players "I'm a Weaver and i'm proud of it" while helping build a stronger community since right now 2-3ppl can easily take care of an entire LS's needs.
1. One bonus ability I could see is access to a new tier of "Forbidden Support" this could increase forbidden % rates. This could be balanced by being tied to a once a week key item or relate it to a quest that can only be repeated once a specific set time.
2. Another idea for specialization is access to a higher tier of crafted gear that require extreme conditions to be met in order to succeed (craft in dangerous area for special support facility or require specialization tool provided above).
3. New crafted items that must be completed upon Boss kill. Items crafted on the spot of the kill in order to make the item/gear/weapon. EX you kill boss of Natalan and he drops a "Decapitator's Gloves" they are in such a state that moving them will cause them to be destroyed but if you have your specialized WVR on hand and ready to craft then he can restore them to New and they can then be moved and equipped as normal.