Check Changeset: 164104392 to see how I would have mapped the footprints. The main points are that you used the right approach to avoid feature overlap by modifying the highway and residential area. Using an existing node like you did is a bonus. Perhaps the highway could have been moved a little less; highway 'lines' should follow the centre of the highway. The L shaped building I flagged is most likely a rectangle, though it's understandable why you mapped it that way. All footprints are valid i.e. they each represent a building visible in imagery.
            ---
            
            Published using OSMCha: https://osmcha.org/changesets/164047198
            