For all the people freaking out, they're going to treat it similar to how they did with the Grand Companies. You'll have your specialist crafting class to get the new recipes and skills, and then once a certain point is achieved, you'll be able to change which crafting class you're specialized in at a certain capped interval. So it'll be okay. You'll just have to plan out how you can effectively and efficiently transition between the specializations. More info was discussed at PAX East and I am posting the link below for everyone to read the recap.

http://www.reddit.com/r/ffxiv/commen...ast_interview/