an excellent one-shot, haven't read one like these lately, although the death of the tinker leaves a bitter taste and the origin of doll-humans leaves my mind very curious...
no seriously, the next one is a spoiler, you've been warned
that Tinker fixed the boy and killed himself, but my first thought was that Tinker put himself in that body without meaning to and somehow stumbled into the well during the transition, and that's going to remain my headcannon. Seems more poetic to me that he 'fixed' himself than that pretty people simply get everything as they should and ugly people are supposed to find meaning in making that happen.