On the totally fictitious topic of park performances...
Honestly, there's a part of me that would say that it's okay to have some sort of live park performance with the Muppet puppets performed by understudies. There's a way they could use a voice track and maybe add lib a line or two at the audience. The costumed Muppet character counterparts are more inconsistent to me, but I understand their place. However, it is a slippery slope.
All (other) live and taped performances should really be the real deal or no deal. If Kermit can’t come, bring a different Muppet in. Why not have made it Gonzo and Camilla or Gonzo in a Kermit costume with Miss Piggy because Kermit stood her up? Hey, Sweetums with Kermit eyes on his head hand a collar would have been amazingly funny! The fact is, that seems closer to what they would have done back in Jim’s day. I’m a little surprised there wasn’t any rehearsal footage.
Or better yet, have a genuinely fake-looking Kermit imposter that Miss Piggy karate chops at the end?