Reason #684626486 why it will be Louisa, not Martin, who makes or breaks the relationship in series 6.
I tend to agree with you, but the writers are so skillful that I wonder how we'll see it initially, until we've had time to analyze it closer. They have always done such a good job of making Martin seem like the bad guy in the relationship, but we have figured out that Louisa has her issues. But I do think we saw him basically embracing a family life style in S5, taking care of family, home, and job in a very conventional way. Now he just needs to see to his woman, too!! and we'll all be happy.