Well, in case of surfaces - not clouds - it kinda makes sense.
You walk over the surface -> the surface affects you and you extinguish it/soak it up.
The burning/poisoned status is only an additional DoT effect.
In a cloud however, that explanation wouldn't make sense.

Now balancing reasons are different again.
If you want a surface to be an obstacle that will hold the player in place for a while, it makes sense again, otherwise if you consider it too much it should be changed.

Last edited by El Zoido; 11/07/14 05:17 PM.