The thing that will make hiding more effective is when/if clothing is incorporated into the equation. From spring until fall, grass clothing should be perfect for this. You can also throw in green or brown colored cloth armor. The same can be said about winter, but with white colored armor. Let someone in RL (sorry I used RL as an example) who has 0 hiding experience hide on the grass in a ghillie suit and then have another person who has mastered hiding (RL hiding) hide in a yellow business suit. The master will be shot first... This is where the distinction should be. You start off at 5 hide, standing in hide makes you seem at 6.25. Etc. I'm just arbitrarily throwing numbers around.