Yeah definately an odd ending. On the one hand, it was a great tribute to Muppet Endings, yet on the other i have no idea if that was actually the original planned end or if it was a rewrite.
Usually when i read either the Muppet or Farscape comic, the first time i read it, i enjoy reading it as a comic then the second time i read it, i picture it in my head as a filmed production on either the big or small screen. If this was an onscreen show, i think it would really leave a lot of the audience befuddled and some of the younger viewers might actually get confused and upset wondering if almost everyone got blown up.