[sadbot]

I am all for something along these lines, so long as its balanced. Vision obscuring objects and effects are quite niche, even more so after smoke was changed, and it's always felt very weird that it rarely has any functional effect because their attacks either auto lock on or can only target a valid tile which they can then find by trial and error. Although I would like to say that B is my preferred option, obscured tiles also make you lose sight of your currently targeted tile which could lead to mistakes even when you're sure of where your target it. A is probably the safe choice for balance purposes, unless a change can be made so that obscured tiles don't obscure your targetable tiles during attacks as well.