I was thinking about something like this the other day, though it was limited to #6. The one thing that bothered me most about vampirism in TES games (or at least the ones I've played: Morrowind, Oblivion, and Skyrim) is that vampires somehow get more powerful the less they feed, and somehow turn back into a fledgling as soon as they have a sip of blood. All those other fancy doodads are nice and all, but modding it so all the bonuses start off at well fed, while keeping the compounding weaknesses as you starve would make playing a vampire worthwhile. I tried it with my thief/assassin character, and almost immediately looked for the guy who could cure it.