Just my two cents here... Muppets stories should stay within the movie zone since I think to try and tell there story on a TV basis wouldn't be any good because, first off sit-coms and various shows aren't allow to have a story that goes really evolves with each episode since the network wants people to be able to tune in to episode without having to seen previous ones. Secondly there stories are vast and grand, hence why I love them. To dull them down wouldn't be any good plus all the characters usually go through an emotional struggle through the course of each film, hence why we love them so much. Also don't forget the musical numbers, all the great things that we love about a muppet story would be lost in TV Format if we tried it.
Muppets on TV should be a variety show since, they are short and they allow in the behind the scenes part for great character interaction. Since someone who new to the show can laugh at the skits and pick up the jokes behind the scenes as they watch more and more. Also it provides for a wealth of different characters to be on the show and allows us to really see the zany side of the muppets.