I’m happy to show you the Gumball of Rhino 9 which has optional extra handles for Drag strength while maintaining the original ones for the full strength. 
Since they are customizable, the user could show or hide any of them separately. For example, the user could opt to show only the Drag strength handles for Move, while those for Rotate and Scale remain hidden. Also, the user could choose whether the Drag strength handles are always visible (no need to activate the “Drag strength” tool) or only temporarily shown while the “Drag strength” tool is active.
While dragging, rotating or scaling in a certain direction or plane, it would be nice to temporarily hide the majority of other handles to make the Gumball look minimalistic and allow better visibility over the adjusted object or sub-object.
Optionally, the numerical value of the Drag strength could be displayed next to the active (grabbed) handle while manipulating the selected object. This is a convenient reminder to help the user remember the currently set value. To change the drag strength value, the user should open the native “Drag strength” panel. After closing it, the Drag strength handles remain visible on the Gumball.
