Yes Move UVN has all the options I would like see, even the delta and the drag strength.
But the concept of moving the CVs with a slider is the crazied most unintuitive way I have ever seen.
I love that Rhino has a little tool for every problem, but the whole CV-modeling aspect in Rhino got a little out of hand.
Rhino has the Gumball (also very useful for other things too yes), Soft Move, Move UVN, UVN Mode(?), End Buldge, Control Polygon mode, Nudge UVN, additionally you have all the curve tools, now in V7 we will see several CV-Tools for SubD modeling etc.
And each of these of offers a totaly unrelated workflow to each other. I dont want this to sound mean, I understand that every CV-problem was solved step by step over time. But after all these years these tools should form a union. One mighty CV-Tool that solves all the CV-Situations, and combines all the tools mentioned above. This could also be used for SubD modeling, calling it Vertex, face etc.:
It works exactly like that in ICEM, moving the CVs along their tangents with a delta value, you just smudge along their Polygon you dont even touch the CV. The tangents dont even light up or anything. It it that intuitive, it just works.
EDIT: I found a little video that shows how the CVs are moved in ICEM, you dont need to select CVs, you push and pull near them: LINK