I suspect that one of the problems they have is trying to get the rights to some of the (potential) archive material may not be achievable; remember TMS was an ATV production not a Disney production and so trying to get access to material from the UK (if it still exists) may be an impossibility.
One feature I hope does make it is the 60 Minutes interview.
I know and it's frustrating. Copyright laws, in theory, are intended to protect the artist, or make it possible for their work to be heard on a large scale. But lately the laws just end up depriving the audience.
And it's true that Bonus Features are intended to be just extras and not the final product. But these older specials and documentaries aren't just "extras", they were well made pieces of entertainment that should be given attention and respect as well. But it's unlikely they will ever be released on their own (though of course you never know). The logically place for them to go is on these Muppet Show season sets, and it's just not happening to the extent that it should.
So it's not so much that I'm upset about a lack of Bonus Features. It's that I'm worried that audiences will never get to see so many of these older programs again, or ever. Muppets go to the Movies was just as good as any episode, but who will ever get to see it? That "I Love Liberty" appearance is classic, but the only time I've been able to see it is at The Museum of TV and Radio. Most people will never see it again, or ever.
Again, at the moment I'm just concerned. I'm waiting to hear about the final product.