I have used that rack a couple ways and like it quite well. One way was as a way to mount the handlebar bag with no bracket. I was bale to take out the stiffeners in the bag when mounted this way.

I have also used it as a mini rear rack when going super light. I has a small bar roll, a few pounds in a backpack, and a few pounds on the rack. Base weight was something like 11 pounds including cooking and camping stuff and it was very pleasant travelling that light.