I don't consider that much waste at all. I did a test "cutting" rotary cutter vs AccuQuilt Go and found that when I sqared up the fat quarters and had to keep doing that, I had almost as much "waste", plus my cuts were not as good as with the AQ-Go. I love my AQ-Go!
P.S. I like the idea of putting the scraps in a pillowcase for pet beds that Gladmaker mentioned in her post (#8).