I almost forgot about that... can't really blame Juhl for being upset, though.
What's unique about one episode in season 4, "Gone But Not Forgotten," is that it starts off corny, until Mudwell wants Wembley to leave, then it gets more and more serious. I think the 'painfulness' of this episode can be excused since it's the starting of a very serious subject matter.
I was thinking a while back... when you watch all 96 episodes, you really see the characters evolve- even more personally than the Muppets. In seasons 1 & 2, they're kinda like grade schoolers, just having fun, but you see them learn and grow with each episode. Then by season 3, it's like they're in high school (or at least, what high schoolers would be like if they had a high school in Fraggle Rock) and in the last season, they just seem so terrifically beautiful, insightful, and wonderous.
And the puppets of the characters look so awesome by the end of the show's run, as well. Especially Mokey. Look at how homeless and hippy-like she was in the beginning. Then, not only did her character mature, but she really did look beautiful... the most stunning of all the Fraggles. I'm not sayin that cuz I have a crush on her; I'm saying that because she looks terrific.
And Wembley's character seems to evolve the most of the Fraggle Five. Up until halfway through the season's run, he's mainly known as the 'wembler.' But he's very decisive and sure of himself the further the show goes on. It'd be really, really hard for the creators to try and do a movie after 20 years and pick up right where they left off without trying to sell themselves primarily to preschoolers.