Couldn't we solve this with a percentage type for zoning, or adding a "mixed commerical/residential" zone? UI wise that shouldn't be any more complicated.
Or you can change the zoning into japanese zoning, where the UI can stay simple as you escalate the permission level of a zone. https://code.uberinternal.com/T2597239
Or you can change the zoning into japanese zoning, where the UI can stay simple as you escalate the permission level of a zone. https://code.uberinternal.com/T2597239