Thanks for the kind words, I really had a blast both having almost full sequences to work on, as well as the simple fact that it was Muppets, but ... yeah it was a lot of shots. This was the reason I was missing so many weekend recordings.
The scan lines were a combination of a nuke plugin, hate using those, that generated the solid separation lines to give it the base "TV" look, and a second pass that was run through the Flame with a banding color effect. By combining those two in various levels with a few other tweaks we were able to get a look that not only looked good on the tv set itself while they were in the tv, but could be modulated slightly so that when they came out we got that "part of the tv" effect that they were looking for. It was more dialing in the look for that effect that took the time, the TV itself was almost more trouble as it was often shot without a screen and bottom at all, so I would have to completely rebuild the base and screen, with the correctly feeling convexness to have that old school look.
The Blue on Blue, was in reality not as bad as you would think. Before things actually shot they did alot of tests with various cameras and blue&green screens to find what worked best. the decision was made that green just didn't work with Kermit in so many shots, but for some reason the levels of blue that we would encounter in the Muppets was usually not enough to cause issues, with exceptions for things like Dr Teeth's hat feather or Gonzo's head feathers, those were either to true blue or "soft" that they didn't like to pick up.
On the arches, I had quite a few ladies for example that had blue fringe or highlighting in their dresses, that just didn't like the blue as much as I would like, but I was able to get the overall shape, so just ended up patching in the interior holes as needed.