I wasn't expecting much from episode 13, but I was actually really surprised. It felt like an appropriate final episode for the series (much more so than 12 did) an made me laugh much more then the previous two or three episodes did. Not bad for what was basically a clip show with an added voice over and a single new scene at the end.
And yes, I was listening to Nobuo at the end and thinking "I really DO want to see those episodes". Oh well, only time will tell. At least we've still got the DVD of the live show to come, and maybe the radio show episodes if anyone bothers to sub them.