I am just guessing. I think specialisation may be related to FC crafting. FC will be able to craft airships, and different parts will have to be made by different crafters, and one player won't be able to have all the crafters leveled up high enough to make all the parts.

The goal would be make people co-operate with each other, and join a real FC with other players (and not a FC with just himself and his alts, to take advantage of the chest and be able to pass things from one alt to another.) Maybe I am completetly mistaken, though.