Oh shoots I just saw this now and looks like I was too late too. But my 2c for what it's worth, I'd like to see more fundamentals stuff, perhaps some newbie oriented and some advanced too (to please both newbies and perhaps more advanced users too). I enjoy the mailbags and teardowns. I'm not a huge fan of the expensive test gear teardowns but that's mostly just me, as I'm not quite at the advanced level to appreciate it, so not necessarily saying to stop them as I'm sure some find them really interesting.
Perhaps more tours of interesting facilities (like that TV broadcasting station, or the particle accelerator etc) would be cool too, but I imagine those are hard to pull off and probably take way more time and planing, and travel etc.
I like the idea of a secondary host. Perhaps the new host can concentrate on one set of topics while you concentrates on another set, or however way you see fit.