I thereby rename your mod idea More Adventurers mod. This is a really good idea by the way. Only bemol I have, they have the same skin as the player? Why not just give them a specific appearance. The mod would only be better.
But now that i think of it maybe we should have them spawn randomly because they can attack the player.
Yes they should respawn except in hardcore.
And yes i like the idea of adding factions and clans i also like the rpg element of stealing that would make survival a whole lot interesting and intense since they could fight each other and because they have factions and clans they could have something like a clan war?
Im so happy someone is going to be working on this mod