MWD and some other marriage guru's all seem to say that if you are having marriage troubles that things will change. That 5 years later (and I think that is arbitrary) you can be in a fantastic marriage.
And I have friends that have verified that their wives went off the deep end for around 5 years but now they are happily married. So do you really think that UR has to shake things up when this has only been going on for a year?
As far as him telling her in words. Hmm I would tell his wife to believe nothing he says and half of what he does. So I dont think you can make an empty threat and it will have any weight.
I also think that her crisis so far has been very mild. The downside to that is I think it will take much longer. Higher energy sometimes burns the fire quicker. Just my .02