My Introduction to Sociology class is working through George Ritzer's McDonaldization: The Reader. Ritzer has extended Max Weber's argument that rationalization is the master principle of modernity into current discussion through the example and metaphor of McDonald's and McDonaldization. In the Reader he includes are article by Sara Raley on the "de-McDonaldization of the family." She wrestles inconclusively with whether McDonaldization - efficiency, predictability, calculability, and control by non-human technology -- has significantly shaped the internal life of families today. Raley opens the essay, though, with the claim that the definition of family has changed significantly since the 1950s Donna Reed norm. Then, one predictable model of family was normative. Now, all kinds of organizations count as family.
I do not think the broadening of how we talk about family really represents "de-McDonaldization." The normative understanding of family life that was honored more in the 1950s -- of a married couple with their children -- was not the norm because it was the most efficient, predictable, calculable, nor technologically controlled. It was normative because most people wanted to achieve that kind of family. Raley adds the ideal of a breadwinner father and housewife mother. That part of the ideal has clearly changed, though not, I think, for de-McDonaldizing reasons.
The ideal of marrying for life and raising your kids together is still the ideal that most people have of family life. Fewer reach that norm than in the 1950s, but most people still do. And even those who do not reach that standard in their own lives still tend to hold it out as a dream. Some people, of course, do not uphold the nuclear family as the norm. But most still do.
If we no longer make as much of a cultural spectacle of the nuclear family as an ideal it is not because we have deMcDonaldized the definition of family. We haven't even changed our cultural ideal. We are just more polite about respecting other family types as well.