I'd really like to see most items in the game become craftable. I wish we could get a ginormous drive going and knock three things out.
I'd make three exceptions.
1. Too big i.e. statutes, houses, wagons, etc.
2. Rare or limited items, i.e. metal, super statted armor and weapons, one-off and unique items.
3. NPC clan specifics and things meant to drive travel, i.e. Cenyr glassware, Red Storm desert wear, etc.
But other than these few exceptions, everything in the game should be craftable by somebody somewhere.