I look forward to it and though this was needed for a long time. To many people can make to many things because it was to easy to level all crafts. Now if you specialize in Alchemy your alchemy items become way more in demand or what ever you specialize in because it gets rid of some of the competition .

It also creates demand. If a goldsmith recipe requires something from alchemy it creates demand for your alchemy items.
If it is like FFXI most basic items you can still make if leveling all. It also makes people work together.

There is a second option too:
I am guessing you might still be able to craft all things but it might just be easier on what you specialize in.