But the bigger problem that no one has addressed is, it doesn't matter one whit about the performers if they don't get decent writers. The success of the Muppets has always been about the writing. Yes, you need the performers to bring the words to life, but without those words, you have nothing. Everything the Muppets do, except for a few off the cuff interviews, is scripted. And if the script is lame, the Muppets, no matter who is performing them, will be lame.
So, you can save the performers all you want (which is what you really mean by "Save the Muppets" or One character, One voice), but if they don't find better writers soon, there won't be any performers to save.