Here's a dot point summary of all the big info from the new previews for Blood and Wine!
The Numbers:
30+ hour adventure.
Over 90 new quests.
Over 40 new points of interest.
Dynamic points of interest system. Killing bandits in their main hideout will affect the number of enemies in surrounding camps.
14000 lines of dialogue (Hearts of Stone had 6000).
100 individual pieces of armor (including new Witcher sets).
More than 20 new monsters.
New Game + maximum level increased to 100.
Armor and Weapons:
New Witcher armour class Grandmaster.
New armour merchant who is the only one able to craft this level of Witcher gear.
Can get blue, hooded armor from Witcher 2, armor from Witcher 1, Ursine Witcher armor with furry pauldron that was in the artbook but cut from the main game.
More than 30 new weapons.
Can now dye armor. Dyes can be bought from a merchant, crafted or looted. Only obtainable in Toussaint. Pink is among the colors.
New Mutation System:
Mutations. 12 new abilities. Mechanic is unlocked through a quest started by a letter from Yennefer. Examples: Signs can have critical hits causing the enemy to explode, instead of dying Geralt is healed and has damage immunity, opponents knocked down by AARD freeze and die instantly. Can only utilize one at a time.
The UI resembles Witcher 2s character customization screen. Basically theyre super strong abilities/stat boosts that require mutagens and skill points to unlock. Can only pick one at a time but you have to unlock earlier ones to get the others.
Despite unlocking it at level 34+ (recommended level to venture to Touissant) the system and anything youve unlocked carries over to New Game+ so you wont have to unlock it again.
UI Changes:
Greatly redesigned User Interface.
Can now rotate Geralt in stats screen.
Books moved to glossary.
Upon looting a readable item a little notification pops up in bottom left of screen. Upon clicking in the right stick (on Xbox One controller), you can read the text of recently looted books, letters, notes etc without having to go to the menu, inventory, finding the right book and so on.
Option to remove fish-eye effect from Witcher sense.
Home Base:
Geralt gets his own motherfucking vineyard.
Its called Corvo Bianco.
You can renovate it with large sums of money, the option I saw was for 5000 Orens.
You can add a greenhouse of sorts where you can grow herbs for all your Witcher potion needs, an armorers table, a stable for Roach (with its own stat bonuses), upgrade your bed, renovated interior and exterior, secret lab, guest room.
Guest room where old friends will come to stay. They said the names Triss and Yennefer, but were reluctant to reveal the names of anyone else who might visit.
Scaffolding and workers will appear after you choose to build something. Each change takes a certain amount of in-game time to complete, but you can just meditate til everythings done.
Can display your armor, weapons, paintings and books.
Some paintings can be bought, or specially made, others are obtained through quests.
Music:
Over 2 hours of new musical content in the game.
Other Tidbits:
Can enter Geralt in a tournament, creating his own logo and team colors.
Can enter under a fake name, although you may not fool everyone.
You can of course race horses, but other events involve crossbow shooting and a grand melee. Seems like there will be more but they didnt want to say.
No new unique weather effects, but the lighting has been prepared specially to reflect the feeling of Southern Europe.
No new hairstyles.
Grass has been optimized, more of it but less expensive.
Improvements to cloth tech (see interview for more detail).
New sword sheathing option. With this new option Geralt no longer automatically unsheathes his sword at the start of combat. Also, he no longer switches weapons to match the opponent. The player has to do it on their own.
...)
