Thralls placed at workbenches could have a tutorial-like dialogue option, where you could ask them specific basic things about the workbench they’re placed in.
That would also breathe some much needed life and personality into them.
It would be fine even with only 2 voice actors, or just lines of text at first.
Since they’re the masters of their craft, they should be able to give you some info about the bench they’re currently placed at, for example:
-Basic functions of the bench
-Upgraded versions of the bench and how they can benefit you
-Where to find the materials needed for the bench (which creatures or biomes to farm, or which processed materials to acquire and where)
Feel free to suggest more questions to ask them.
Even with those 3 questions answered alone, you would help the game with immersion/making characters more alive, another layer of tutorial that fits in the game world seamlessly (especially for players who don’t delve deep into the menus), convenience.