There obviously isn't much expansion in ROTJ, though there is a bit that was kind of fun. I thought it was kind of clever that one scene was described in a conversation between C-3PO and Arika, aka Mara Jade undercover. There are only six episodes, compared to 13 in ANH and 10 in ESB, but to the credit of ROTJ, the episodes are a bit longer. Also, considering there were many scenes without much dialogue (the battles in particular), it's kind of hard to make that into a purely audio experience of any significant length. But I do agree, I wish it had been longer. But I also agree with fishmanlee, I was surprised at how well I liked it, and in some ways I liked it better than the film!