One suggestion that came out of the last playtest was to add a formal finish to any scene. Most time, play just flows from one person to another, one locaiton to the next, and from scene to scene. That's all well and good, but given that certain mechanics apply for one scene, he asked that we formally declare the end of a scene to clear up any ambiguity.
It's a small thing, but I like it. I think the appealing part of it is that by asking for scene close by consensus, it gets the players thinking about story structure and pulls them into more of a director stance, even if subtly. Anything that helps bridge that divide between players and GM is a good thing in my opinion. Many games have suffered when players show up with no sense of responsibility beyond attendence and playing their own character in a vacuum, and the GM runs games and plots with no eye toward engaging the players, instead looking at their characters as his own playthings. It's gone bad from both ends. Meeting in the middle, even in small ways like this, brings everyone closer together, and I really look forward to seeing how this easily implimented practice changes play.