Michael, are you talking about a "Rebuild" command, but for surfaces instead of curves?

Sounds like if it would work on splines, another order level would sound natural. It would allow for more defined control over an already created surface if needed.

With that, since points are allowed to be added or removed from a spline curve, could that translate to an established surface?

Isn't that something that would be hard to do for a trimmed surface that is already joined to other surfaces?