As touch-focused as Onyx is, it would be GREAT if you could drag-and-drop for Move and Copy - and maybe even Delete. All over the interface - Presets, Groups, Cuelists, Playback Indicators, cues in the Selected Cuelist window, etc.
Left-click drag, or 1 finger drag for Move
Right-click drag, or 2 finger drag for Copy
Not sure what the method to implement this it idea for Delete would be, but it could be done as well.