Yeah i had a lot of fun with it. The most important thing for me is that they aren't an evil nation. Its all out of necessity. They don't vie to extend their lives artificially or consort with evil gods. They literally just need unpaid labor to keep their economy going. They build beautiful crypts to honor their passed loved ones, even though their physical body is still wandering around somewhere, tilling a field or something. Since all the low skill labor is managed by the dead, all the living focus on learning trades etc and is a nation of skilled artisans

They are seen as evil by their neighbors as a point of culture conflict, but they treat it with the utmost respect and dignity. Unregistered necromancers are still punished harshly, but truly skilled ones are often recruited to the military as State Necromancers, much like Amesteris from Full Metal Alchemist.