I don't like Derse being the solely opposing force to the players. It feels weird and incomplete that Prospit are just the good guys who job to the Dersites who are not only the ones who are going to win but also bribing the denizens and creating all the little underlings anywhere.

I like the idea that Prospitians are (secretly) also against the players winning, but instead of not wanting the new universe to be created they just want to sustain or keep the current universe as it is; or let the players rule Skaia as a planet for all eternity but not letting them actually finish the grand work and complete their quest of maturation and growth.