Congratulations on surviving a WAS vacation! I don't think you can rekindle a relationship with a WAS, because to your point, their behavior kills your feelings for them over time.

You need to wait until they are no longer a WAS and "just a person" again, because at that point they can exhibit some behaviors toward you that you may find attractive. You need to push the big "reset" button and that doesn't seem to happen until the WAS is *convinced* that you have moved on. As long as you're in the picture, you are the source of their discontent. Once you've moved on, then you can be "just a person" again too!

Accuray

Married 18, Together 20, Now Divorced
M: 48, W: 50, D: 18, S: 16, D: 12
Bomb Dropped (EA, D): 7/13/11
Start Reconcile: 8/15/11
Bomb Dropped (EA, D): 5/1/2014 (Divorced)
In a New Relationship: 3/2015