So, finished it today...overall I would rate it 8 or 9 out of 10, but the potential was there to become my most favorite game of all time.
The strong point of the game really is the immersion. It's creaty by a believable world, great characters and AMAZING graphics. The last point makes everything fun in the game. It sounds stupid, but running and discovering the game world was a joy of it's own. Walking through the floatsam forest was so immersive that I totally forgot everything else.
The story was kinda meh. It had it's moments but shifted too strong to "fantasy politics" blablabla. I hate that. It's so unnecesary. I mean it's ok to have that, but don't focus that. Focus Geralt and Triss or whatever, make it more personal. I don't like that shit. Politics is boring as fuck, in reality as in fiction. And tbh I didn't understand even half of it because they throw names at you and past things and stuff like nothing and at some point I just didn't pay too much attention to it. Though I have to say that I loved the characters and just watching them interact. Geralt is so cool, one of the best game characters ever.
Also like already discussed, the battler and upgrade system is not without faults, especially the latter. The game was overall way too easy on normal. Way too easy. I only had problems in the very beginning but after I managed and mastered Quen I was undefeatable. I'm sure I could've beaten it without upgrading anything like swords or my skills.
While the tech is there and it looks amazing it comes with several quirks which are not so nice. The above mentioned texture flickering, some stuttering from time to time, heavy mouse lag, stuff like that...but the hell, it looks amazing, so who gives a fuck in the end.
So yeah, overall, the game excels at immersion and game world and that's important for an RPG. I love it for that, I really do. Floatsam was the best part though. Overall, the gameworld was realtively small. It feels big in the beginning but if you think about it now, ther is not much to discover (compared to f.e. Skyrim). So I really hope they hold on to their strengths and go all out for TW3 which could be the best game ever made.