In Rhino 6’s “Blend surface”, the locked sliders for both ends moved smoothly no matter what’s the continuity for each end. Even if one of the blend surface’s ends was G0, the sliders were still fully responsive. However, Rhino 7’s sliders don’t work smoothly if one of the blend surface’s ends is set to G0. Upon trying to move the slider for the G0 end the former will move just slightly, then will stop and will no longer follow the movement of the mouse pointer. Here is a video showing that behaviour. Rhino 6 did it much better in that regard:
It was reported more than two years ago and I wonder what’s the situation with it.