I appreciate the concern Murzinio, but if the option is in the game, and when I say "in the game" I mean, wherever I travel in the map, or whatever region I go, when I press the "esc" button and go to the graphics option, it's there, there's no reason fot me to use a MOD or whatever reshade available. There's no warning, as the Mezziaz said, preventing me from being surprised if the said option does not work properly.
And I don't think that they meant this from the beggining. I start to believe it's too much work involved to add this option back in the game (expansion area), that they just create this "excuse" as a cover.
What you're saying here is pure speculation. I, too, thought it was just an oversight, and I was surprised that the issue was not addressed immediately, actually. Now, what that says to me is -- even though I thought it was a simple, direct issue that could be easily fixed -- I was incorrect.
In fact, it's either a terribly complex issue that the devs are not going to spend time trying to explain...or it's a very, very simple issue that the art department had to make a call on. From what I'm gathering from discussions about this over time, the sharpening is still functioning, but some of the other graphical tweaks used in the visuals for Blood and Wine are overriding it. Whether that means that they disable the effect in the engine or whether it's mitigated to the point that it's virtually undetectable, I don't know.
That's all speculation, too, though. You've heard exactly what we have about it: "It shall remain."