I mean not really I don’t see it any differently than reading a book of someone who died. Should we not publish books of authors who died. The students would ask questions to the current professor/TA teaching the class. The implications on the labor value are essentially nonexistent. You can’t pay a corpse and I assume there is still someone running/teaching the class that would get paid to do so. The living person’s labor is getting compensated. Whether or not the widow or next of kin should also be compensated for using their family member’s teaching material is a separate question relating to the ownership of work. In a capitalist society the university owns his work. In a socialist society I think there could be a legitimate debate on who owns the work of the dead. If it’s the family would all the descendants be paid indefinitely for the work and how is that different from a bourgeoisie class? I think your issue is really with capitalism in general. There’s really nothing wrong with this and in a socialist society I don’t see how it would really play out differently.