i think part of the charm behind the bombcasts and the quick looks is their length. i tune in as much for the personalities as for the information, and I get the feeling that if anything was shortened it would take away too much from the personalities and the interaction of Ryan + crew.
And ultimately, the beauty of the format in which both are presented to us is that you can make the duration last as long as you want to: Don't like them droning on about LA Noire for 30 minutes? Skip to the next segment. Don't want to watch an hour and a half quick-look? Well, if you got the gist of it after 20 minutes, then that's all you need.
I could see your argument being a credible concern if everything was a live broadcast that could not be fast-forwarded, paused, and where you couldn't jump around from time-frame to time-frame. But this is not the case. You have all the power you need not to have a 2.5 hr podcast. It's right there in your hand.
I love how Sony realized that there is something to the whole let's-re-sell-you-the-same-game-again-Nintendo-kind-of-way.
I'm not even knocking it. Heck, if I owned a ps3 it would be precisely for the Shadow/Ico HD collection and now the FFX HD version. Hell, I almost bought a system just to play Shadow of the Colossus at a decent frame rate and HD-fied. Go Sony go, learn from the master!
yeah i agree with the above comments that as far as truly interactive stories go, the major triple AAA houses aside from Bethesda might not be your best bet. The others you mentioned are very good at making you feel as if you are causing actual interaction with the plot-line while still funneling you down the same narrative with minor, although non-vital, changes depending on your decisions. You spoke about Obsidian before, and if you want to really check out a game where more than any other it definitely feels like your actions matter (although I highly doubt they did), their horrid spy-rpg Alpha Protocol is worth a look; the one thing that game does phenomenally well is deal with your choices.
You could also look at games that purposefully take away your ability to influence decisions. Bioshock comes to mind with its ending, which is basically like a big F-U to players affecting the narrative.
On a broader note: what about involving games that take a much larger scope to player-driven narrative? Something like Civilization 5 or The Sims where you basically tell your own story that is entirely made up of how you interact with the world with each new game. Progressive narratives like these might make for an interesting chapter in your dissertation.