There are plenty of QA tools available including such which show data that is stale. It is true that very large multi-polygons can be hard to edit however they

There are plenty of QA tools available including such which show data that is stale. It is true that very large multi-polygons can be hard to edit however they tend to be exclusively used for modelling large landuse areas and administrative boundaries, and tend to have no impact at all on adding and editing roads, buildings, POIs and so on.