I listened to the commentary for the first time today. Since two of the four reviews I've read expressed disapointment over the commentary, I was expecting to be let down though still optimistic. And it turned out to be more on-topic than expected. I prefer commentaries that focus more on information than humor (it took awhile for me to really warm up to the UHF commentary), but this was better than I'd expected (though it's still a shame there's no performer commentary, whether as themselves or as characters... I would have put in Kermit, Piggy, Fozzie, Gonzo, Walter, Scooter, and Rowlf, with maybe appearances by others).
It was cool that Muppet Central and Muppet Wiki were mentioned. I can't remember if Tough Pigs or The Muppet Mindset were mentioned.
The joking did get annoying after awhile, mainly when it came to stuff I feel should have been obvious. When somebody asked the name of Thog, I was hoping they'd talk a bit about him, maybe discuss whether they needed to convince Disney to have him rebuilt or if Disney agreed to rebuilding anybody, but then one of them asked "What's the name of the green frog?" I feel that might have been a distraction, though they did talk a bit about him later.
And a lot of "How'd they do that?" questions when it seems obvious it was green screened and matted later. And when bringing up cast members it seemed abit annoying that they mentioned things they were in. I guess it's useful if you're not too familiar with their work (and there were quite a few celebrities I wasn't familiar with), but to mention some of the things Whoopi Goldberg is in? Though does she have a "signature" production? She's been in so much, albeit normally in a supporting or cameo role, that it's hard for me to determine what she's most famous for (I wonder the same regarding Charles Grodin, even after reading his wikipedia article... All I really know him from is GMC and the Beethoven movies... and that one episode of SNL).
For years I've been wondering how they normally keep hats on the characters, and during the credits they say the hats just fit on the heads. But with all the joking around I can't really tell if that's true or a joke... I can see Fozzie and Zoot's hats fitting on easily (especially since Fozzie is not only frequently seen taking his hat off, but it sometimes falls off by mistake), but I'd find it hard to believe that Dr. Teeth and Swedish Chef's hats can stay there without having to attach somehow, and given the shape of Kermit's head I don't see how it could stay there.
I still haven't watched all the features, but I've watched all the deleted scenes, including the easter eggs, and the featurette (which I've noticed has bits that had appeared online before the movie was released) and the trailers (the two new trailers aren't as good as the ones we've previously seen). I could have done without the "Screen Test on the Way to the Read-Through". So all I've got left to watch is the bloopers reel and certain easter eggs.