Did you try to find out why was the landuse mapped this way before declaring multipolygons useless and mass-converting them?

Mapping usually isn't one-off action. Once mapped, landuse may need further editing e.g. in order to add previously missed detail or reflect changes on the ground. For me editing landuse mapped as 'simple polygons' is significantly more time-consuming and requires extra effort compared to multipolygons. Should I expect you to maintain and refine the landuse you converted?
