I liked IAVMMCM, because I like to put background stories to things, to tie everything together, I liked that this movie was set in the theatre, which ties the movie back the muppet show.
I've tried to think of the muppets as a big company with Kermit as the CEO and then there are 2 VPs and different departments and everyone works in a different department, and I've also come up with an explanation for the muppets getting older, in my idea, they do get older, and that most of them are in their 50s and 60s by now, but they eat healthy and stay in shape, so they look younger as for the hair, they might die it or maybe it stays the same color