But how should we describe cities like Philadelphia or Washington? The very centers of these cities are returning to health, but you don't have to travel too far from Rittenhouse Square or Gallery Place to return to blight.
You have these little pockets of revitalization floating in the center of still somewhat-troubled urban seas, with most of the population gain still happening outside of the city.
I think "bullseye" kind of describes such places, but offers perhaps a less than ideal connotation. What would be a better term?