It does not seem very fair to make thralls mandatory in order to craft certain items. It takes away the role playing elements and makes unlocking skills seem redundant. Such as alchemy. What is the point of unlocking the skill tree if the player cannot create their own orb?
I personally prefer to play these sort of games alone and take care of my own things without any other characters other than farm animals and mounts. I have never planned to use any NPCs in conan. This pretty much makes the game unplayable for me at this point because I cannot have a secluded place without the need of baby sitting. It is forced overlord play.
It is understandable if thralls give crafting bonuses like more items perk make or decreased crafting time or cost. It would even make sense to just allow players to craft anything they want without the skill unlocked as long as they have a thrall, that should be a primary purpose. It seems a bit unnecessary to make them mandatory since there is a skill for crafting. It would be like the elderscrolls forcing players to find high tier blacksmith and alchemist to make certain weapons and potions when they are putting perk points into these skills.