I use curves a lot. The bright white banner at the top is visually distracting and interferes with my visually balancing the image. Also, to get to the "preview" toggle you have to cover part of the photo with the curves command which is very visually distracting. I sugget on all commands the preview toggle should be as far left as possible so the command pallate can be shifted as far right away from the image as possible. In the curves command, the "preview" can be just right of the "channel" option.
Great product. I've been using it for 30 years or so. Thanks for consideration.