Another situation is when I want to replace a face. Maybe their eyes were closed or not smiling. I have another photo where they look ‘better’, but lighting and color doesn’t match the main image. Someone in the sunshine or shadows, for example. I can imagine Match Color can help. I think it might be even more helpful if I could click on a face of the main/base layer and have that applied / matched onto a face within a pasted layer. Sometimes the color of some faces are a little different than an entire target image.