Yeah, about the vocals - I've read already several opinions that - to simplify it - vocals are bad, mkay.
We want to treat vocals just as any other musical instrument in the ensemble. Proper vocal technique (i.e. archaic singing, in polish: biały śpiew; literal translation: white voice/white singing) used in the right place, in the right moment and in the right proportions can help the scene. So based on the stuff you already saw yesterday - please note you only heard vocals twice:
- when Gerallt was fighting bandits (vocal layer is only triggered when situation becomes dangerous - so Geralt is facing several opponents at once, or just one, but really heavy, hard to elliminate)
- during end sequence of combat with the griffin (we used vocals to highlight the scene, you didn't hear them during gameplay).
I can assure you there's plenty of pure instrumental stuff int the game and vocal stuff is not taking over, but - it's not like that 5min gameplay you saw was just an accident. We do use vocals - only where they just need to be, where they fit.
It's just the same as ethnic/slavic vs symphonic music influences in TW3. I also believe we found the golden mean here.