Just venting some thoughts here. Regarding the LBS vs. the WAS and why I think it's relevant.
The WAS leaves because they can't stand the sitch as it is. Usually, they believe the LBS would take them back because they were previously happy, or at least not unhappy enough to leave. Unfortunately, the WAS doesn't usually want to go back because they have no reason to believe it won't just be more of the same-old.
The LBS is often clueless, even happy in the M before the WAS leaves. They have a vested interest in getting the WAS to return so they can get back to the happiness they had before. Not that it was perfect, but again, obviously not bad enough to leave.
If the WAS returns voluntarily, what is the motivation for the LBS to do anything different? Why would the WAS return if it was likely going to be the same as before? Could it potentially be detrimental to the R if the WAS reengages prior to the LBS doing the 180's?