The scuff isn't that bad right now because I've only had the plate mounted for a few days with no use. Imagine using this on and off a tripod with a heavy lens over and over again. It will eventually dig deeper into the body.
In terms of security, it still holds like a champ with no twist due to its design. I'd just rather have the camera body resting against the smooth edge vs. the corner of that shelf... grrrr...!