Some new details from PC Gamer via Neogaf via a German magazine.
o Man's Land features 25 smaller towns, some of which are the size of Flotsam from The Witcher 2.
The game features two really big cities: Novigrad and Oxenfurt, both very lively.
passages with Ciri are like a linear action-adventure, not like a RPG, plays differently and more action-fueled than Geralt's passages (no inventory, no skill tree, depending on the scene Ciri has certain skills)
Ciri sequences will be (in total) 5-10h
Many small details such as Roach stopping to eat apples from a basket
All equipped items are visible in-game on Geralt
best items in game must be crafted
mutagens can be very powerful, like 40% damage enhancer for signs
fist fighting is without QTEs now, it's just like normal fighting with hard and fast strikes and such
there are horseraces similar to RDR, biggest focus on stamina management during races, you can even buy better saddles for horseraces
Geralts beard will grow. You have to go to a barber after a few days
The HUD is fully customizable. Icons and quest markers on the map can also be deactivated. Audiovisual hints (e.g. people screaming for help) will be present if you wish to do so.
Fluid gameplay on 1080p with everything on maximum +nvidia hairworks on GTX 980
game loading time is extremely short on the high-end PC
Ultra settings are impressive, especially the rich vegetation and character models; there can be scenes where difference between high and ultra won't be that noticeable; lighting is impressive: for instance evening light falling on vast flower fields of a parfum-maker
there was indeed no slider or adjustment option for the draw distance/LOD
They encountered very few bugs, no crashes of freezes.