I don't want to put words into Ben's mouth, but from discussing housing and urban issues with people of his stripe I find they honestly don't know what they're talking about and seem to just wish the human population would go away. Suburbs are bad of course for legit reasons, we can agree on those points. But dense cities are bad too because they are "artificial" and "dehumanizing" and "dependant on vast supply chains". The ideal way to house humans seems to be in low-medium density villages that are mostly self-sufficient (grow their own food, create their own crafts). They still want tiny footprints and no sprawl though, so they basically just want everyone living in little eco farming towns of 10-20k people. Or just have a few million people total on earth all living in little "earth ship" cabins because agriculture and society are evil and unnatural constructs.
That or they don't even think that far. Suburbs are bad because sprawl. Cities are bad because concrete. They don't actually have a solution, they just know everything is bad and unnatural.
But once again I don't want to put words in his mouth. I'd be interested what his exact vision for a city, specially THIS city, would be. Specifics, not buzzwords.