Back to the subject of taking the Babies out of the Nursery...
If there's one thing I think both The Muppets '15 and The Muppet Show Comic Book did brilliantly, it was that they took the action outside of the show. Sure, The Muppet Show did have like one on location episode, and that was pretty good for a change of pace. Taking them out of that fixed location really gave the story aspects some depth to them. It's a shame that they never really did such things in the original series for the sake of fawning over guest stars.
As for Muppet Babies, I'm all for them exploring and being taken places. Much as I despise Baby Looney Tunes (though I'm starting to be convinced that the late 60's LT cartoons are the worst), taking the babies other places and meeting others and learning about things actually worked. Thing is, BLT did steal a lot from MB, everything that is except their fantasy sequences. Those do technically take them out of the Nursery, especially in extended sequences. I would hope if they do take the Babies around places they find a nice balance of fantasy segments and outside segments and incorporate some setting into their fantasy sequences. Especially extended full episode ones.