I've watched Adventure time from the beginning. It started off fairly crappy, but built up a nice mythos. The characters matured a bit and became likable. Then we get to this episode. Not only is it boring and lifeless compared to many other episodes, it also seems thoughtless and strangely stereotypical. How many other places have we heard the "dream of a butterfly" line? It's incredibly commonplace and the creators of the show didn't even change it up any. Additionally, the build up made by the comet was destroyed as expectations for a groundbreaking episode were nullified. It didn't really add anything more than that of the normal episode, but it used up the most anticipated part of the story arc to do it.