This whole DB vs Tough love debate is kind of interesting. To be honest the whole DB approach seems very doormatty to me precisely as there doesn't seem to be a "Plan B" component like in Marriage Builders.
Personally, I think after two years of being on all the major infidelity boards, the people who were most effective where those who threw out their WAS and took immediate steps to protect themselves and their children emotionally, financially, and legally. When the WAS comes back on these occasions they are normally very remorseful and extremely aware and respectful of the BS's boundaries.
Unfortunately, you don't tend to see so many of those stories as the people who take this type of action are normally not the kind to hang around on bulletin boards trying to get advice or build consensus for their decisions.