Will the current neighborhood blocks disappear? If so, fine.
But if not, perhaps they could be transformed into Community Gardens. As an example, my old-style house is on Savi Sense in Bortola. My idea is to leave the sign for "Savi Sense Quarter" (or whatever it says) and change the wording to "Savi Sense Community Garden" and have it be only one street instead of dozens of blocks - and be a community garden instead of a neighborhood block (duh :D ).
Perhaps they could be useful once new players return to the game after the re-launch, since presumably they initially won't have enough imagination accrued to create their own. Perhaps higher-level players may not wish to use their imagination to create garden plots in their homes. I've long thought that the conflicts we previously had with community gardens could be alleviated somewhat if there were simply many more of them.