It would also allow for planned relocation so that residents who are being disrupted could be guaranteed housing without cost increases, since it would cost ess

It would also allow for planned relocation so that residents who are being disrupted could be guaranteed housing without cost increases, since it would cost essentially nothing relative to overall cost to provide them replacement homes in the higher density neighborhood just rebuilt. I believe Rohnert Park, which borders Santa Rosa, is already doing this (not with pie slices though). Definitely this is a known SimCity tactic to build a high density high wealth city! You just have to get the feeder road layout right.