Another thought: I think we use the term Walkaway Spouse/Wife to encompass more than it was intended to encompass. MWD described this as a particular syndrome and although DBing, or parts of DBing may be effective in many marriages in crises, WAW syndrome was not intended to describe every situation where a spouse wants to leave a marriage.
Sorry you lost me here. Why do you think this?
Because Michelle Weiner Davis coined the term Walkaway Wife in describing a particular "syndrome," not any spouse that wants out of a marriage. Some wives leave because their husband is having an affair, has temper issues, drug addiction, etc. The WAW leaves because of a lack of connection, or at least the feeling that the connection is lost. Here is a link to MWD's article on the subject in Psychology today, though I know there is a similar article somewhere on this site.