I wouldn't want to close a changeset with every save, but closing before exiting (if possible) would be nice. That way you don't end up with a changeset that stays open for an hour with "Changeset still open - discussion will open once the changeset is closed. " displayed at osm.org.
Another "nice to have", somewhat related to https://github.com/systemed/potlatch3/issues/9 .
I wouldn't want to close a changeset with every save, but closing before exiting (if possible) would be nice. That way you don't end up with a changeset that stays open for an hour with "Changeset still open - discussion will open once the changeset is closed. " displayed at osm.org.