There is a great depth to this show that requires more questions as the years go on; I just wish convention-goers will see your clips and go past the old questions and think of those new ones! ;-)
You're getting me where we live now! Any time I have to prepare for a panel or roundtable, I always try to do a little homework and think of at least ONE thing that isn't going to sound like the battery of same-old that they'll be asked. With public/fan panels at cons of course it's different - there's that element you have your finger on, which is that there are always people discovering the show and it's impossible to know everything that's out there. Everything is fresh to them, and not everyone gets into it so deeply they seek out every sound byte like we do. ;) But YES, the complexities of ideas that the show approaches guarantees that debate will always be healthy (and encouraged, IMO).
Oh, and certain stories are just always, always funny! Have you watched the clip where they talk about "33"? - that story about EJO wanting OMG ALL THE SUICIDES? They told that on the Roundtable Podcast years ago but it's as funny now as it ever was.