I think it is fine the way it is. Certainly not a "big problem"
Just another way of possibly doing it, which as Shaki said, would take a lot of the danger away from cloud and terrain effects. Right now I try to avoid getting into fire or poison. If this got "fixed" I wouldn't care about status effects at all. If anything, smarter enemies might help, rather than an effect nerf, though I think the enemies are fairly smart already.
