Here’s an idea I just had after getting one of my own chapter release emails:
The area below the chapter title looks a little empty, I realize this space is probably there for people who release multiple chapters at a time, but I had the thought that it’d be nice to be able to include a short description/mini-blurb with each chapter to accompany it in these release notifications, kind of like an episode description in a TV guide, to help entice people to click through and read.