Just use degree 2 and 5 surfaces in the first place. No need to convert one thing into another.
In many cases curves and surfaces with tens of control points are used, including ones sent by customers that need a reverse engineering. 
But even when I work with multi-span curves, Degree 4 is superior.
RH-80116 is fixed in Rhino 8 Service Release 5 Release Candidate
Nasty customers!
; )