I think this is something that would add a ton of value, especially for photos of people. A large percentage of the time in Lightroom, I find myself applying a radial filter around the subject’s face, and then locally tweak exposure / sharpness / colours as needed (note that lightroom allows you to affect inside or outside the filter, which is very useful). It’s a very quick but impactful edit to make a subject pop out of a photo.
Nik, I know you’ve implemented custom placement of vignettes, but that’s not quite as effective when there are multiple subjects.
I know it’s bold to say this, but I often feel as though my photos edited in Raw Power are missing a little something-something. This could go a long way to solving that, for me at least. Two big thumbs up for this feature if you’re able to do it!