Maybe as a starting point for a script. RMA_path_blend.scm Uses two paths and there are snags - the paths must have the same number of nodes + empty space to fill in.
http://www.silent9.com/incoming/scripts/ about 4 down
Comparison: https://i.imgur.com/MZxztVw.jpg
http://www.silent9.com/incoming/scripts/ about 4 down
Comparison: https://i.imgur.com/MZxztVw.jpg