This sounds very much like the interactions my W and I have. Amazing how time changes things.
After a period of no or little contact, the anger, guilt, and resentment starts to fade, and the WAS starts to miss the good things the M offered. My W clearly misses aspects of our old life together, and yours does now too. Mix that together with the noticeable absence of the bad things from the M, and the WAW gets increasingly conflicted.
I think little doses of these "reminders" can be good, followed by long periods of no contact, eventually followed by a strong indication of "I'm moving on to someone else, and they're going to get the new improved me". At that point, the WAW feels true crisis, and realizes the choice is no longer theirs to make.
