"And along the way, you may find W starting to pull on that rope a bit, and when she finds no resistance (you are not holding so tight on your end) she may pull harder."
This happens VERY RARELY so don't get your hopes up!!!
The WAW will find EVERY remote reason under the sun to blame the LBS for the 'sitch'. Even if you did 'drop the rope' and go 'dim' they will say: see "I made the right decision, he really doesn't care'. Instead of 'drop the rope' I'd say 'hope for best, prepare for the worst'. Assume the WAW is gone forever - find one sentence to describe why they walked away and then forget about them and work your way up from there.