The matching functions need to show measurements ie deviations, otherwise they are useless.
G0=mm
G1= ° ’ ''
G2=mm
G3 = ° ’ ‘’
Furthermore a SWAP button should be added to swap the matched surface with the reference from within the command. This is useful if you try to control the matched surface by manipulating the reference.
Realtime control of the reference side is also needed, so the matching updates as you manipulate the reference, while showing the deviations and measurements.
Zebra-shading has to work while you are running the matching command.
Regarding surface manipulation a tool is needed to move control points along their tangents, in normal direction or locked into an axis direction of a construction plane or the WCS, with the option to choose single points or complete rows in either u or v direction.
A proper surface extrapolation tool is also needed, with the to option to extrapolate a single edge or an endpoint of an edge so the other end stays in place.
A delta value for those functions is a must, as you gain immense precison using it in combination with the deviation measurements from the matching tool.
Tangents, normals, and controlpoints need to light up when used to give visual feedback.
I hope that some of these functions make it into Rhino V6, as they are key for aprofessional modelling workflow and surface control.
Best regards and thanks for all the hard work you guys put into Rhino!