Eliminate the hitting marks

If I am not mistaking, the idea of the game focus more on the the importance of stealth and how the environment including wolves plays with it. In that sense I find that the hitting marks (the ones displayed when you're hit) decrease the importance of stealth and makes you less focused and afraid of the surroundings.

Do you mean the blood that spurts when you hit an enemy?

No, I mean the marker that show you in which direction you are been hit.

I agree with this. This game has more of a survival feel, and if you're going to take away the hit markers, you might want to consider getting rid of the cross hair. There is almost no recoil to have to mitigate, so it would make you have to ADS.