I think Miller needs to be looking for a new gig. Arbitron ratings have him at 0.3% share, half of what his opening was at a less thamn steller 0.6% If the trend holds in 8 months the only person watching Miller's show will be his mother and his crazy cousin Lenny.
Miller is a concert comedian and sketch type. He has to have a live audience to be effective. It's a timing thing. Ironically it was just the opposite of Rush. Rush didn't need a live audience for TV and had one. Miller needs an audience and doesn't.
Miller is also a monologuist and a commentator. He can't have a dialogue or an interview. If you showed him a video of something and asked him to make clever comments, he could do it, but when there's a comeback, he's not as pithy. Of course, nobody is. The only "comedic" types who do talk radio or talk TV either do a prepared schtick (Daily Show) or do impressions (Brian Whitman and he's not always funny).
I think Miller might find his niche if he realizes he doesn't always have to be funny.