Command “Extrude curve normal to the surface”: you could add the ability to run an extrusion for more than a curve?
Command “Array”:
If you want to execute a rectangular array of a circle or of an ellipse, for example, and wanted that the elements of the series is touched at a point (in this case, the tangent point), how to do? (You could trigger a snap that allows within the command to attach the elements between them).
or I want the elements of the series will touch on these points:
before starting the _Array command, select the object to array and run _BoundingBox. When you now start the _Array command and entered the number along X and Y and Rhino asks for the cell spacing, pick the lower left and upper right corner of the bounding box to get what you want.