Being "friends" with a was is cake-eating. Period.
Maybe in your case it would be, but it wouldn't be in mine.
I would tell my wife I am perfectly happy being friends if she had another lover. I would also tell her that although we would now ONLY be friends, that I don't share my lovers with others and that I want her to move out asap..
I would also hope that she would still be my friend when I am dating and having the time of my life living it up with other hot women.
Oh yes, we can be friends. Maybe she could be friends with me AND my new woman...
I wouldn't want to waste time trying not to be friends. It is LOVERS I wouldn't want to be with a WS..
So in my case it would be ME that would be cake eating. A hot new woman or two in my life and my WS as my friend.