To those talking about master crafters and such, only 1 craft can be mastered

chances are....they will add some sort of "specialization" or something around those lines that give you huge penalties if you dont have it, and youll be limited to get just the 1, but youll be able to craft to max level in every craft

so lets take an example of this

Blacksmithing may have a "weaponsmaster" trait that you can get, but if you get it, you can never get any other of these "master" traits from any other class.
And it may be a requirement to make items for the higher rank items. And while sure you can still rank up to top rank, you sure as hell cant make everything without the specialization(you may be stuck to parts only later without it)

i see them more going something along those lines as far as only mastering 1 craft late game, and i dont see them restricting the ability to level the actual classes