I use it frankly for my non-main classes. Once all the questies are gone so are the rewards, and not all classes that one person has will be able to outfit their chara up. At most the dungeons replace what I can make but I don't do those very often or when I do the drop rate is unfairly against me.

Still I enjoy it. But is it really worth it? Depends on what you want out of it. Eventually crafting is going to become moot when everyone is 50 using upper tier 'raiding' gear.