Nodes relinking.

Say I have a subgraph  saved in same sbs , now  I want some of its instances  do slight different thing.     in Blender I can  make a group  instance unique and local to the file ,   make an override.  All this seam impossible in SD .   The only way is to make a copy  , change what it does  and then manually  drop  and reconnect .      Is so  painstakingly annoying   coming after using  Blender.   Especially in some loop like operation like slope blur .      Am I missing something?