I don't see it as a flaw, but simply an engineering trade off. Overdrive is a normal consequence of using an aggressive control scheme, inverse ghosting is an artifact of overshoot and is an understood part of control theory.
ASUS DISPLAY SETTINGS MONITOR WINDOWS
In shooters at 120+ fps having it to "Fast" mode the monitor maintains clarity in motion better and I don't notice ghosting in gaming as much as I do in the Windows desktop. With the setting set to "Fast" ghosting becomes much more noticeable, but I like having the option. Normal has some ghosting but it's very minimal and I only notice it when my mouse cursor passes over very specific colors. I have a new 144 Hz Dell monitor that is overdriven, but it has two modes "Normal" and "Fast". Yes, overdrive will still have the same effects on an IPS panel. Try dragging windows quickly across your desktop with overdrive on and off and try changing your background to different solid colors, see if you can notice a difference. See how as the window is dragged around the monitor is displaying a purple color? That's inverse ghosting. This is referred to in the community as "inverse ghosting" as the shadow can sometimes follow the moving object or anticipate its movement and the color often looks wrong like an inverted color image. That's because the pixels that were white to display my mouse pointer are trying to change to that bluish-gray color as fast as possible and they overshoot and display purple before settling on the correct color.
For example, on my monitor under fast mode, if I drag my mouse cursor across a bluish-gray background, it appears to have a purple shadow following it. The pixels displaying the wrong color are anywhere there are large changes in color. That's why overdrive is used at all, because even though it overshoots the correct value, it gets to it faster than if you didn't. Notice how the red line gets to 1 quicker than the green line. The 1 line is the position the crystals need to be in to display the proper color, the red line is how the crystal moves over time to get there when overdrive is enabled, as opposed to the blue or green line that would be used typically. This image shows what overdrive is from a control theory standpoint. The side effect of this is that for a brief moment, the pixel is displaying the wrong color as it back tracks to the correct value. Overdrive applies more voltage than is needed to get the crystals to move as fast as possible, sometimes the crystals are moving so fast that they don't stop at the desired position, they pass it a little bit and then have to be moved back some. These crystals are physical things that have to move, so naturally it takes some time to do it. Depending on how much voltage is applied the crystals will allow some fraction of light to pass through to your eye. In an LCD, there are little crystals that align to an applied electric field (voltage). Honestly, I'm not sure what I should look for.
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