Louise Gold is still working as a puppeteer on a UK television program with one of Muppet Central's long time members Warrick!
Dude... I TOTALLY need to know the name of that show!
Jim was already getting away from just doing the Muppets before his death. He kind of wanted Disney to run the machine so that he could pop in and perform at his leisure. Disney ownership provided him with the perpetual green-light for whatever he wanted to do and without the pitching, and wrangling he always had to go through as head of the Henson Company.
Honestly, I really feel he wanted to move the Muppets down for kids and focus on the grander creature shop projects. The proof is there with the Jim Henson Play-a-long Videos. Plus, there really weren't all that many Muppet projects directly after MTM... except for Muppet Babies.
The thing is, Jim always drove the "Muppet bus" and without the gang's leader things get crazy just as the Muppet gang does without Kermit. This current plan is good, but I hope Muppets Studio has or gets a consistent leader whether it's a producer or performer. Since he's gone, Henson Co can't seem to get the Dark Crystal sequel off the ground and have finally gotten around to reviving the Fraggles. Sesame Street’s puppet leadership under Kevin Clash has turned into the Elmo Show. Disney has finally discovered marketing possibilities in the Muppets to put a solid effort behind them.
When anyone passes on who creates something that immense, of course things will be off in direction, focus, and general vision is gone with them. At least for a while. Look how long it took Disney to get back on its feet without Walt. And even then, it bows to the pressure of being popular and staying in money while totally ignoring where it came from. I will say the House of Mouse, Mouseworks, and movies like the Three Musketeers are the best versions of Mickey I've ever seen. He's actually... interesting and has a personality.
I always felt the Muppet Show didn't truly go off the air because there was nothing left to say. I always felt Jim wanted to say other things with other characters in other mediums. He had a billion ideas and just wanted to get as many made as he could. That's why I'm not so certain he'd nix the idea of a Muppet Show revival if around today. It's a great platform for experimentation. I still think he'd be doing so much on the web!
Jim was a media nomad. He didn't like to root into one thing... he love to explore what he could do and push everything to the limit. I think he pulled the Muppet Show because he knew that pulling it after 5 seasons leaves you wanting more, without leaving you woefully unsatisfied. He didn't kill the characters then and there, he kept them. It's really different than being a TV show. Sure, you can cancel a show, make a couple spin offs with one or two characters... but it's still a TV show... or a movie based off a TV show. The way Jim treated them, the characters were doing a TV show and then they moved on to bigger and better things. They weren't characters... they became actors in their own right.
As for Family Guy and South Park. Well, the worst current episodes of Family Guy are still better than the worst season one episodes and the best eps are still very funny. It's got a lot of life left. South Park provides social commentary for current events in a way that isn't totally dated. Having new episodes on the air always makes sense to me. They might think of limiting the number to enhance quality.
As for Family Guy, well it's found a whole new fanbase as well as some of fans from the first couple seasons. I don't think Family as well written as a show as South Park, but it's good for the simple laugh and there's nothing wrong with that. Doesn't mean it should be taken off the air.
Off topic but I have to comment. I think Family Guy is going into the toilet
because of the new audience that Jancie mentioned. Gamer slackers that love crummy internet movies and demand a laugh per second, no matter how clumsily placed they are. Plus, the dreaded adult swim influence. If you ever watched on of their tedious "look how adult we are! We have sex AND drug jokes, and we make fun of stuff from the 80's" shows, you know what I mean. They stole FG's jokes for one, making them less shocking, and more mundane.
South Park is always fresh because they always deal with current stuff... granted, the same manner of secret cults that control things... blah blah blah... but that Jonas Brothers episode proves that they know what's what.