You deleted footpritns which outlined multiple buildings; I think this is fine to do, but if you can identify a the feature that existing data was representing then the best practice is to modify the existing data (as you did for some of these footprints, rather than deleting and re mapping. These footprints are generally accurate but could be a touch smaller (shift + -). Two of the footprints which I flagged outline two buildings each.
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            Published using OSMCha: https://osmcha.org/changesets/164770871
            