The Guild Wars 2 crafting news is yet another occurrence of game developers *first* creating a fully fleshed game, and *then* parachuting a crafting system in. If they find the time (WAR shipped with a half-baked system). Apparently a crafting system is somewhere on the list of required features, but developers don't think it is all that important. Thus the primary requirement for any MMORPG crafting system appears to be that it can't produce anything actually useful, because that would distract players from the *real* game.
I wonder how a MMORPG would look like if the developers *first* designed the crafting system, trade, and the player economy. And *then* designed the adventuring system around that.