Hello there,
I noticed you have been mapping linear footways as pedestrian areas en masse. If you want to add the area of a footway you should tag it as area:highway=footway, as area=yes + highway=pedestrian is reserved for pedestrian areas such as squares or plazas. Not only is it incorrect mapping, it also poses problems for routers as they usually plan a route around the edge of the area instead of through the middle as with a simple linear way.