The only reason why I'm not seriously worried about the show (concerned, but not pulling my hair out of my head) is that ABC really wants to make this show work. I'm glad that not only are they rerunning it, but showing marathons every so often.
Of course, it can't be stated enough that this is the first season and the writers are trying to get this show. There's a balance between not making it Muppet Show 3.0 and trying to keep the Muppet factor in there. It's painfully obvious in the first few episodes they were trying to find the sweet spot of not making a kid's show, but not making anything too raunchy (I reiterate, old Simpsons episodes are more risque), and I think they finally found it halfway through. Let's be honest. This show isn't easy. There's a lot of risks they took, and some of them were very worth while. Some stuff fell flat, but it seems they've distanced themselves from what didn't work in earlier episodes.