Thanks for the reply. If place=suburb doesn't have to mean "suburb" in the dictionary sense, then city and town don't have to either. If we tag wards as suburbs, it can really screw up how address lookups work in systems like Nominatim (for example, in Saigon ward, now contains Thu Duc city node for every address) unless we removed the previous second-level divisions. Plus, it frees up the place=village tag for the actual villages (thôn and ấp) that sit under the communes, which just feels right. As I said, it was just to standardize the wards and communes, it's up to you if you want to fix the address. Regards.