I have tested your formula but I don’t like the new hybrid method. With the current method I like that I can set the scanlines so that multiple brightest colors have no scanline with the scanline strength setting but with the new method only color 255 has no scanline and only at hybrid 100%.
If people don’t calibrate their consoles with the gain function then most consoles will output <= 240 so with the new method they won’t have colors without scanlines.
If you want to have scanlines in all colors you could just use Linear scanlines with Hybrid Low around 50% scanline strength or use Multiplication which always has scanlines in all colors with any setting.
I tested the reverse LPF but its not working anymore. It just shifts the picture to the right when > 0.