Just some observations, appreciate if others can confirm this:
1. When an image and corresponding LCC has hit the dark edge of the image circle, it appears that creating the LCC has some strange effects. Specifically, I see banding and exposure anomalies in the processed LCC frame. What I have noticed is that if I crop the RAW LCC frame before creating the LCC, it processes a nice smooth LCC frame. I would normally crop the dark corners in he final image anyway, so no net loss.
2. Clarity/Structure - When using clarity/structure in "Punch" mode on LCC processed images, some of the colour casts appear to come back. Alternatively, if clarity/structure is applied in "neutral" mode, this does not appear to be the case
3. I typically have WB set for daylight for all my landscape shots. I have noticed that when processing the LCC, especially in low light conditions where a longer LCC exposure is needed, the final LCC tends towards the cooler side for WB. If I white balance the LCC frame after it is processed, but before I apply it to the image file, I get pretty good results. This normal process would be to apply the LCC and then white balance the processed image.
Just want to confirm that these are valid assumptions and workarounds. Any thoughts from others would be very helpful and much appreciated.