What kind of crafting system do you eventually want? can you describe it to us?
Well, we haven't run full designs on any of it, and this doesn't really include my colleague's thoughts on the matter, so take it all just as random chatter; but some assorted rambling:
1. Tinkering - We added tinkering as our first 'craft' because it's really core to the flavor of the world, as well as the first major plotline. We would like to add the ability to apply modifications to exist equipment as well, and I'd expect this in the medium term (sooner than 'actually never'), because we think it's pretty core to the value of tinkering. The overall balance and UI for tinkering is still really rough, so I wouldnt' be surprised if it changed quite a bit once or more as time goes on.
2. Smithing/Tailoring - Tinkering lets you create artifacts, but I'd like to provide crafting based on drops from butchery and ore you can dig up to create and maintain the rest of the gamut of items in the game. This would probably be recipie driven like Tinkering, with drops from plants, animals and walls to allow a different subset of items and mods than tinkering to be created. This would come after tinkering in the grand scheme of things, but I wouldn't expect it until after our '1.0' release. As it was added, we'd probably add more brutal degredation/breaking of items.
3. Medicine/Healing - Tinkering lets you create injectors of various sorts, but I'd probably want to branch the 'drugs' category off into a seperate craft, perhaps using 'autoinjector blanks' you can tinker up and filling them with stuff crafted by healing instead. It would utilize harvested drops from plants and organs from butchery. This would probably come after smithing/tailoring.
4. More general world/townbuilding - In the dim future (maybe never) I would like to add a major plot that would allow you to grow and defend a settlement in the world, with the 'win' condition for that being surviving a certain set of events, and providing for a thriving settlement. This would be a long time from now, and might just end up being a seperate game if it happens.