Keep in mind I'm saying this for the sake of constructive criticism, I found the game enjoyable in my 125 hours of gameplay. Completed on Death March.
Graphics department:
Even with the downgrade complaints thought the game was really gorgeous, but if I'm to offer my thoughts here it is. 8/10 for me I'm very satisfied with it, shame that Hairworks don't work with my AMD card.
Improve on decals, body parts gore (if you cut someone in half from his belly you will receive a pre built corpse as if it was slice in 45º degree), improvements on blood on the water, grass and texture rendering distance.
Gameplay Combat:
Now this one could use a tweak, I give combat a 6/10.
-The AI need to be more ruthless, always trying to flank, keep attacking like its life depend on it.
-Increase the threat range area where the mob will chase you and make his chase relentless, once engaged you shall commit yourself to that battle.(Before someone say ah that's too punishing, you can always save)
-Make potions endure a bit more though, add a timer to get its effects if you are engaged in combat and add a cooldown to avoid for example spamming Swallow and White Raffard's Decoction, that trivializes encounters.(With this you will remove the need to make 1 shotting encounters)
-Combat animations could use a speed up, its a personal opinion on this, I feel dodging stuff easy in this game.Or it could be the iFrame in dodge that makes it trivial.
-Make Parry more useful so you can use in monster combat and be able to mix parry and dodge
-Make Parry more difficult to be achieved, though having a more rewarding result when you achieve it (Incorporate that talent that adds +dmg% when you parry and a chance to knockdown the opponent to be something that Geralt has in his base character)
-More attack patterns in each monster enemy.
-Give an option to remove auto aim from crossbows.
-Let Geralt cast Aard, Axii and Quen during underwater combat, add an harpoon so he can use melee combat.
-Allow Geralt to manually switch swords, having combat with steel/silver enemies mixed in the encounter is a pain the ass. I should be able to choose which sword is more advantageous for that moment.
Story wise: (WARNING MIGHT HAVE A BIT OF SPOILER DON'T READ)
The story for me was excellent it invoked all the possible feelings, anger, joy, sadness and so on.Though could use one tweak there and there, nothing that affects the game really much. Solid 9.5/10
-Even if prefer Yen, I think Triss story could use some vitamins and get a better disclosure I guess?
-I know that the game is based on the books, but keep in mind this series built a tradition in gaming too, could address both characters of TW1 and 2 like Siegfried, Iorveth, Yarpen, Skalen ,Sheldon, Saskia, Prince Stennis, Henselt, The people of Flotsam, The Scoiatel in general and The Order of the Flaming rose.