Whoa! Big guidelines update.
For what it's worth, this removes most of my qualms about the themes, because:
--There is no longer language in the guidelines that says reprints are preferred.
--The pro pay for original stories now encourages authors to send new fiction if they have it.
--With the prior two points, I think that authors will be more likely to write something new specifically for the theme. This seems to work out well for Crossed Genres.