"The Complete Game Heroes Retrospective (abridged)"
We're in the same boat in regards to our relationship to the site. I've made most if not all the same observations that you have. However I do not see the need for daily content in order to bring on a new revival for the site. When it comes to putting out videos, all things considered, I think everyone, especially Tom, has done a great job of putting out consistent content, despite having a pared down crew. But I do still think your points on that are valid.
Here are 3 things I recommend to impact viewership and community interaction:
A: Augment time between weekly videos with community interaction - This means actively build casual gaming relationships with viewers on this site. You play games. We play games. No doubt this is already taking place behind the scenes. Make it part of the scene here.
B: Hold Competitive Online Tournaments: You have a website. People like to see their names on a website when they have accomplished something. Have competitions regularly, but never on a whim. Promote them in your social networks. A lot of those who compete may not even stick around for the podcasts, but you'll build a name for yourself. There's some stickiness there.
C: This one might sound ridiculous, but hear me out. Find a way to display video length next to the videos on the website. People will cycle through a ton of videos each day, but will only give your video attention if the video length does not interfere with their "busy" schedule. With time being an unknown factor before clicking a TGH video, people may immediately decide it is not worth their time.
None of these options require the need to change your video schedule, though tournaments and community play may present opportunities for new content. Things like the online tournament would have some logistical challenges that I haven't thought through, but it would be worth evaluating.