Townies still need to be generated to fill NPC roles, so unless we can easily give NPC roles to created Sims, cutting off townie generation completely would not be the greatest option. Unless you don't mind your games to be bare and seeing the same Sims all the time. I'd rather they expanded upon townie generation, with much more variance and household structure than the sad excuse for the system now. Though, I've gotten a lot of great Sims that were once townies.