A preview of the upcoming vampire changes in the Elder Scrolls Online has been posted on the official forums. Here is a mobile-friendly summary of the changes and the teaser video.
Summary
- “The Vampire Skill Line has not seen significant changes since its inception, beyond some minor combat balancing tweaks” – Kyle Nowak, Combat Designer
- Dramatic changes and additions to the Skill Line, including the creation of brand new abilities and either replacing or updating existing ones.
- The goal of the redesign was to make Vampires more active and engaging when in battle.
- The main [combat] themes being Blood Magic, hit-and-run aggressiveness, and stealth and elusiveness.- New synergies that reflects the “Blood Magic”.
 Examples:- Eviscerate is a straightforward spammable that deals more damage based on your own missing Health
- Blood Frenzy is a toggle ability that drains your own Health in exchange for increased Weapon and Spell Damage.
 
-  New ultimate ability, called Blood Scion, which transforms your character into a monstrous beast.- While in this form- boosts to your Health, Stamina, and Magicka pools,
- heal yourself when dealing damage,
- see your enemies through walls.
 
 
- While in this form
 
- New synergies that reflects the “Blood Magic”.
- Changes to Vampire stages- Activating and Maintaining- Increase your stage by feeding on NPCs, but they also slowly decrease over time
- Each stage you reach decreases the cost of your Vampire active abilities and activates certain passive abilities
 
 - Penalties- Reduction in Health Recovery
- Increase in damage from Flame attacks
- Increase cost for non-Vampire abilities
 
 
- Activating and Maintaining
- Justice System changes- if you use certain Vampire abilities in public spaces (such as towns, cities, etc.), there’s a good chance you’ll be spotted and have a bounty put on your head.
 - if your blood curse is at stage four, many NPCs (including merchants) will recognize you as somebody afflicted by vampirism and will refuse to deal with you.
 - playing a unique cut scene each time you drain the life from an unsuspecting victim. This is similar to how the Dark Brotherhood’s Blade of Woe.
 
