Custom Cable colors
Routing can get quite complex and the back of the rack a spider web that's hard to read visually. Yes, there are tooltips, and "Scroll to connected" and of course "Reduce cable clutter", so it's not completely unusable. But I think it would help even more if you could assign a custom color to a cable you've selected. Perhaps there would be a pattern of stripes to distinguish CV from Audio, since with custom colors, they'd no longer be distinguished by color. Following the color would make it much easer to see the routing at a glance.