Really? That makes me want to write a letter. I'm not much for boycotts etc, but I put my foot down when it comes to hosing the Muppets - especially projects from the Jim era. However there could be an internal tug-of-war over song rights between the song writers and record companies. That wouldn't surprise me. Why do I think this wouldn't be an issue if Jim Henson were still around?
I don't think releases are diminished by a lack of extras or special features. I like the Muppet Show. Oooh, also for trivia, the 2008 day calendar has some. Don't know how much, but some.
Music rights typically have nothing to do with the record companies unless you are licensing the original recordings. In the case of any song that might be famous enough to be included on the muppet show, it was most likely the decision of the publishing company that controlled the song. Most songwriters hand off control of such matters to larger publishing companies that manage massive catalogues.
In America, songwriters are amazingly well protected, and the one thing that you can not do without the songwriter/publisher's consent is sync their song to images. BUT that being said, money is money, and these songwriters all agreed to some kind of terms in the first place. I still can't imagine why anybody would hold out, as long as disney was negotiating what they call a "favored nations" type agreement, where all songwriters were paid the same on the project. It may have been that disney tried to negotiate each song one by one to get the "best" rate, which doesn't usually sit well within that community. If they alienated one publishing company in the process, that could explain the random missing musical numbers.
This was probably too much info for everyone... but fascinating to me...