They’ve edited again, and seem to have got the message about not add building=yes to every selected object. They’re still not using sensible changeset comments, and there are more than a few building/road and building/building overlaps.

I’ve blocked them again saying essentially “please get in touch” at https://www.openstreetmap.org/user_blocks/2641 but would be grateful if people more familiar with the areas edited could see if there are any other problems that I haven’t spotted.