And personally I don’t think that just being there to explain his change sets is good enough, he really should add good change set comments since it allows for easier collaboration along with allowing other contributors that work on improving the map in Miami dade to get a good idea of what was done in the commit at a glance, OSM is a community effort after all, we must all do our best to work together and good change set comments in my opinion are an important pillar of that.