"no more nice bloom at nights"
Btw, at '0' LOD bias, at a distance thin objects such as trees and the transmission towers at Suzuka(
https://www.fiawtcr.com/suzuka-circuit-east-course-to-challenge-wtcr-drivers-in-japan/) are rendered at half resolution? Not sure, but they appear as a grid of separated pixels; This is not unheard of, GTA5 renders distant tree at half res in a checker-board pattern. In any case, they look catastrophic and the TAA completely freaks out, I tried '-1' as well but the improvements are only marginal, so I keep it at '-2'. I did tweak the graphical settings so I'll reinstall the mod for confirmation later.
"taxing features are 4K shadows, Reflections, HBAO" Agree, I turned down the shadows and reflection resolution as well for easy fps. But compared to shadow resolution, I am more hesitant to compromise reflection resolution since the reflection on the bonnet is right in-front of your view. Most AAA games apply a blur to screen spaced specular reflections to mask the low resolution, not sure if this can be done in AC.
For motion blur do you plan of substituting the shader patch one with a reshade solution?
https://github.com/Mortalitas/GShade-Shaders/blob/master/Shaders/TAA.fx this is included in the mod but not used, is it any good?