Eh, it feels kind os disingenuous to me, especially coming from Coca-Cola. I'm all for Americana and getting all sentimental about what makes America great, but for me that comes part-in-parcel with also discussing what's ugly about the nation's history. In my mind, the greatness and the horror are so inexorably intertwined that you have to utter them in the same sentence. And the things that are good about this country are deep and old and complex, spanning worlds and worlds of life and experiences, enough for the histories of a thousand smaller nations. It's difficult to capture that in a 30 second spot. This feels like the Hallmark Card version of American multiculturalism. It's a nice sentiment, but it rings kind of hollow. It completely lacks the richness and the context of the real thing, and it feels like it was made by people who only have a cursory understanding of what it is and don't actually give that much of a damn about it.
Also, perhaps this is my bias, I just don't associate multiculturalism and egalitarianism with a huge monolithic mega-corporations that sell processed fake sugar that puts you at a higher risk of diabetes. From them, it feels forced.