It is a waste of slots that doesn't just work relatively badly, but often makes it harder to notice things.
Like in many FPS games that have both night vision and flashlight, it's better to just point the cone of light at things. More - in factorio you can aim at things you can't see, revealing them in the process.
My suggestions (some are mutually exclusive):
- Drop the filter or raise the contrast. Turrets can see in the dark - computer vision is a much harder real life problem than not-ugly night vision.
- Make the device raise ambient light levels. Multiple visors could raise it further.
- Make it act like a lamp with huge radius and low power. Multiple visors would be needed to see far.
- Make the night absurdly dark, so that the ugly filter is still better than lack of it.
- Disable aiming in the dark
- Make it show hitboxes, turning it into more of a robocop-style computer vision assistant than night vision.
- Make it manual, instead of having it activate long before it's needed and deactivate long after it stops.
