Hi there.  I've made a further change (changeset 161887591) here to :  1. merge in the separate point for "Atelier Point" into the building.  2. add building:part objects to set the different heights of the different parts of the building.  3. replaced the 'layer' tags with building:level and building:min_level tags.   ...  There is probably room for more refinement, including puting on all the entrances and figuring out how entrance to E Rosa house works since it's apparently mostly starting on level 2.   I'll try to get over there tomorrow to have a look.  