Ok, so now its possible to be a vampire, you just haven't given a good reason to be one yet.
Now blood frenzy can't be kept up indefinitely by heavy heal-as-you-go classes (though they still have a significant advantage), but you fixed half the problem by making the other half worse. Now it can't really be effectively used anywhere but pvp, since its all fast burst damage and they don't rely on healers. The better way to fix it would be to knock the whole thing down a few notches: Make it a 50% cut to ALL healing, reduce the power buff, reduce the base health cost (especially important with the new change). This way it can be useful/usable for everyone, and not OP for any one small group of people. Another thing that could help would be adding a passive major prophecy while slotted. This way it can be used in place of inner light, since with the current set up the only imaginable way to use it is to toggle it on before dropping ult, which isn't worth loosing a damage ability for.
Eviscerate is still incredibly lack luster. Its another one that's nearly useless in pve since you if you're in a situation where your health is low enough to make a difference you are definitely not attacking, and certainly not at melee range. Not to mention that the animation looks like a Pokemon ability, so very out of place in an Elder Scrolls game.
As for the feeding passive, it is a definitive improvement. One serious issue though is sticking with the 100% health regen debuff at stage 4. It makes it ridiculously and unnecessarily annoying to do things like falling a short distance. Just make it a 90% debuff, or even 95%. Just leave something so we don't have to keep looking at our decreased health after stubbing our toe.
Vampire needs to be designed so anybody can take it or leave it. As it is you'll still have RPers just taking the stage 1 debuffs for nothing in return, and a new breed of magicka gankers in pvp who take it. And everybody else leaving it.
Current Vampire Outlook: All except for my Vamp-NB (has to stay, since vamp is part of his identity) are still going to be cured. (For perspective: If vampire was done correctly, I would have 3 current vamp chars staying vampires, and the other 4 getting cured)