I really think they could be more imaginative with their content. This is just off the top of my head but what about...
Slow week? Then let's call it "Mario Week" and just turn the cameras on and play some games.
On Monday, Drew plays through Super Mario Brothers 1 while the rest of them commentate and talk about their memories and feelings about SMB1.
On Tuesday, Dan plays through Super Mario Brothers 2 while the rest of them commentate and talk about their memories and feelings about SMB2.
...And so on, until Friday when someone is playing Super Mario 64 (or whatever) for a while, as the others talk about it.
Who wouldn't want to watch that? It's practically free for them to do and would be interesting, depending on their discussions while the person is playing. It would work with a ton of different series, I just chose Mario at random.