EDIT:
Please add a "White Balance" color picker to the VFB and opacity slider for the LUT.
Totally agree, A fast way to whitebalance and a focus picker has to be more important than LUT support. I have only tried the lut solution directly on the render in Octane, and thats a really nice feature, could it be
possible to have something like lift, gamma and gain before LUT support? That way we have more controll over the contrast (the saturation is a nice feature). Then at the end maybe apply LUTs, just to test different color variations on the image. We also need a button to turn things off, in a quick an fast way, an hiding things in the post tab. leaving only exposure and maybe whitebalance, ready for compositing work, its to easy to render something and then later realise you forgot to reset one of the sliders, help me not to make mistakes:D Sorry maybe I went a bit off the LUTs topic.
Anyway the glare, glow and vignetting, works and looks amazing!