Absolutely stunning Images!
BTW, your news releases and images have a very devout following here in Rochester, NY.!
I give presentations on Astronomy in several senior homes, and each presentation starts with an update of the Cassini mission.
The senior residents follow your story very much like a serial TV show. Each satellite, moonlet and feature is for them like a character in a movie series and each has it's fans.
I find it curious that erosion-like patterns are only found on the sides facing the top of the image. The sides of the features facing the bottom of the page appear to be smooth.
Looks a bit like wind erosion with a very predominent wind coming from the top of the image.