I really liked when they updated small things in the Harbor and Market as the years rolled by... but I'd definitely like to see more change in the extended Hub maps.
House P could use a rework, maybe some new construction or bridges.
House J got a nice one, so they're OK for now.
House K could DEFINITELY be made to look less boring / tedious.
House D is OK as well, less noticeable.
House C is fine.
I'd really like to see the Market Tent rebuilt... it's been long enough. Maybe after you complete Chrono, when you come back it's fixed or built anew? It looks real shabby for a marketplace.