Heineken's "Holiday" ad: Sorry, but I just don't get it.

And I don't get certain YouTube posters concerning this ad (which is showing up twice per commercial break during bowl games today)  either.

What exactly is non-traditional about this ad?  There's a Dad here.  There are twins. There's a stepdaughter, and a "reveal" that mom- who I guess is either divorced or widowed- has a boyfriend.  Is it that the stepdaughter isn't wearing a pretty dress, or that she' swearing "untraditional" makeup?  Is it that mom's new boyfriend is an artist, and he's not wearing a cardigan or smoking a pipe, or that he has long hair and a beard?  What is it about any of these people that makes them "untraditional?"

Is just that the ad features a blended family?  Does Heineken think that this is a 21st century phenomenon?  Is it even possible that anyone could think this?

I can't get the answer from the YouTube posters who think that this ad represents "degeneracy" and "the breakdown of the nuclear family"- no kidding, check it out.  So can you help me with this?  What am I missing here?