For me, answer to this question is rather clear. When playing Skyrim, I want to feel the immersion everywhere I go. Talking about the slavery and sexual immersion mostly, I want to see it's touch in every Skyrim's secluded corner. Building a great, bugless, intensive and perfectly running questline on a brand new cell(s), outside the actual Skyrim world is a great effort, but it strips me off this important feeling - for the actual Skyrim remains empty.

This is the reason why I build my (first) mod Slaverun in Whiterun. Even tough the mod is buggy (mostly because of my modding 'virginity' when building it) and placed in the most problematic and populated place, I do not regret it. It represents all I expect from slavery-immersion mod - to build upon the vanilla foundations and to create a new experience in the old world.

To bring immersion to at least some places around Skyrim, I've created two mods adding (more or less static) female slaves to bandit camps. To bring terror upon another bad places, Skyrim's prisons, I've created the Horrified Female Prisons mod.

My vision of immersive Skyrim is slowly turning true..

For those who enjoy the same vision I have a good news - another mod will be coming. I've mentioned in the thread for mod 'SexSlaves for Vanilla Bandit Camps' that Cragslane was skipped for a reason - and that reason is now emerging. It will be a special place with more PC and non-PC interaction than in any of my previous mods before. And I hope that I've learned from my mistakes and this new mod will be as bugless as it gets.

So afterwards we will have another addition to the old Skyrim to complement the vision of slavery/sex filled Skyrim!

PS: For all the fellow modders out there, please do not take this as criticism about building mods in a new cells. I very well understand the reasons to that. All I want is to explain why I rather (try to) overcome the difficulties of building upon old cells and to perhaps motivate you to do the same..