So what everyone is saying is that the pact the Glenmoril Witches made with the Companions is void and non existant? They did make a pact with the Glenmoril Witches...years after the Companions already had Lycanthropy.
It was years after? I thought they made the pact to gain Lycanthropy. Where'd you read this?
And it'll only get worse with each new TES game, since they will no doubt try to get away with doing the Companions-style werewolves in EVERY game from now on, much to the annoyance of fans who want forced lunar transformations and the gross contradiction to lore, just like how they keep insistingly using the same "backwards feeding" mechanic for vampires with every game now, even though it doesn't make any sense anymore to continue using the much-maligned mechanic other than their idea of making vampirism "balanced," though I'm certain there are much better ways of handling that than how they handled it in Oblivion and Skyrim.
Yeah, I'm a bit afraid of what they'll try and do next. The backwards feeding doesn't make sense in this game, unless we had the Cyrodiilic strain edging into Skyrim (Sybil Stentor would have been perfect to be an agent of the Order in Skyrim).
If they want vampirism to be balanced, give them simple weaknesses: silver, fire, sun damage, etc. Also, make feeding required to keep up your strength, not the other way around.
I've said it before and I'll say it again: There should be multiple ranks of vampirism, just like we have with enemies (Fledgling-Master). When you first turn, you're a fledgling: you have minimum buffs and maximum weaknesses, and the sun will pretty much kill you in an instant. The more you feed, the stronger you become, until you reach a new level of vampirism, which increases your buffs and lowers your weaknesses. At a Master Vampire level of strength, the sun can still kill you, and all your other weaknesses are there, but they don't do nearly the amount of damage they did before.
Only the Cyrodiilic strain should be able to blend in (aside from some of the ones mentioned in Valenwood, but even they have tell tale signs), which would explain why you would be able to find them in every province of Tamriel (since they can blend in and all). The other vampires would be attacked on sight, unless you had certain items equipped that allowed you to go about unnoticed (closed face helmets would be too easy, unless there were certain places they wouldn't let you go with a closed face helm and some shopkeepers would refuse to do business with you).
There's more I could put on this subject, but for now I'll close with this: Non-Cyrodillic Vampires should not be given incentive NOT to feed!