drachehexe: All the landscape looks like you're playing in an oil painting. Trees, grass, flowers, bushes, water. It's really off-puting.
CyniclyPink: I am an artist who does a lot of oil painting and that was exactly what I thought when I first started playing the game. It's pretty in a way, but being an immersion freak, and liking realistic textures in my games ( like my Skyrim with a lot of texture mods), I was a bit disappointed.
IMO, immersion is not about realism. Not at all. Realistic games are very, very rare.*
It is about letting you dive into a shared dream, with little or nothing to make you wake from it until you want to.
Crashes, bad controls, strange inventory and HUD systems can be immersion breakers - but never the graphic style.
The style is for something else: the atmosphere. Is it lighthearted, serious, gritty, dreamlike, weird, fairytale, military, horror...
The part of Witcher 3 we're talking about here reminds me of the Witcher 1 quest, "The Heat of the Day". You recall those fields? The way everything looked set the mood for appearance of the noonwraiths and... everything else.
So, IMHO the real question is: which feeling does this style evoke in you? Does it fit your idea of the Witcher world?
* Operation Flashpoint maybe or Arma.