tl;dr: This is the Vaticidal mod "unbalanced" branch release candidate announcement.

It's been nearly four years since Skyrim release. In the world of gaming, it's an entire generation. And in the next four years, another generation will come; those who four years ago were too young or simply not into this kind of games. With these people in mind, I've designed Vaticidal - a mod augmenting the main quest of Skyrim. This is not to say that veteran players won't find it entertaining as well. In fact, since this release is remarkably unbalanced, it's perfectly valid to postpone using this mod until your second playthrough.

http://www.nexusmods.com/skyrim/mods/55704?

Today's uploaded 0.9-RC "release candidate" version got voice-overs redone, and along the way some of the cornerstones of questing logic, scripts and dialogues received enhancements to fulfill the Vaticidal August vision of playable adventure.