Okay...
First off, I think people worried that this is going to impact FR or Eberron need to cut back on caffeine.

The article says "default setting" in so many words. Multiple times.
FR is not the default setting. Eberron is not the default setting.
The default setting is the land that includes the deities in the
Player's Handbook. The default setting is the world in which non-campaign-specific modules are set.
Just like, you know, it was in 3E.
Honestly, I think the default setting they've described sounds really interesting
as an option. And since
an option is all the default setting
ever was, that's just fine.
I also see absolutely no reason why the "points of light" setting cannot include large cities with urban adventure and political intrigue. In fact, powerful, despotic city-states are often
the norm for fiction written in that sort of fantasy setting. And the article says "centers of civilization are few and far between." Not
absent.
The notion that anything in the article makes urban/political gaming impossible or unlikely is ludicrous.