Well, it likely came just in time for me...bought a ticket tonight for a 6-segment RT (with WP# in there) and got two middle seat assignments

that couldn't be fixed except with Coach Choice. My fare was a budget one, but I could imagine lotsa late bookers as paying in the higher categories on business and looking at the same thing (Coach Choice or middle).
Will try to bag something different in the 24-hour window if I don't get saved by EUA. Seems like there's a whole pre-flight seat-jockeying to-do list now!