I just do not understand the willingness to live in a hive. Ancient cities were densely populated because of the need to limit the ratio of defensive wall per person protected. In later eras cities tended to be dense to limit transportation and communications distances and time. Thetelephone and automobile enabled less dense suburbs. Honorverse air car technology should enable even greater dispersion.
Up until last year, I was living in an honest to goodness shopping mall. First floor had the stores, second floor and up had apartments (studio up through 2 bedroom) in some buildings, business offices in other buildings. It had almost everything I needed: a bookstore, movie theater, various clothing stores, restaurants, even a dentist. Nor was I particularly pressed for space in my apartment. If not for the lack of a grocery store, I would never have to leave except for work. The only real constraint was the mall is a bit on the small side, so it could not expand to fulfill every single need no matter how niche (such as a computer parts store).
I could see someone taking this to the logical next step in the future, building one whole integrated community into a single tower. A Honorverse tower does not have to mean living packed cheek-to-jowl (although our experience with megatropolises in China, Japan, and India suggest that humans can adapt regardless). It just means you can hop in the grav lift and get somewhere in 5 minutes, instead of hopping in your air car and get there in 15. It is all about the convenience.