I think that en enhanced or additional Match command to cover this case would be motivated. A new MatchByTwist" would take an additional “opposite fixed edge” as input and retain the original structure as default (or optionally refine). In short, same as MatchSrf with the additional option of “twist between opposite fixed edge”.
In the next R7 candidate?
Notice that this operation would support a very efficient workflow for making transitions from grossly sketched (finally) complex surfaces as demonstrated in the video below (after the “MatchByTwist” operation(s) discussed in the thread one would cut back the surfaces and BlendSurf, which seems to be a very efficient workflow. I tried this workflow last night in the old Volvo grille cleanup with good result. It felt Fast and Furious:
// Rolf